Tanusree "Tanu" Khurana and Rishi Singh Bedi are childhood friends just like their fathers Veerendra and Raj in Patiala. They wanted to get Rishi and Tanu married. Katyani Bai prophecies they will be together for the next seven births. Rano who dislikes Tanu, tricks Raj into going to America. Tanu and Rishi part ways but vow to reunite when they grow up.
17 years later
Tanu desperately waits for Rishi since 17 years, who returns to India. Rishi is a boxer and ladies' man. Veerendra and Sharda die in a terrorist attack. Bani (Veerendra's brother's wife) sends Tanu and Ahana to Mumbai and misleads Bedis that Neha is Tanu and introduces Tanu as Tanvi. Rishi gets engaged to Neha but falls in love with Tanvi (actual Tanu) who is set to be wed to Pawan. Neha has a boyfriend Sandeep "Sandy" Sikand. Pawan first seemed to be a good man but Rishi is suspicious of him. Pawan is revealed to be already married to Saloni who pretends to be his sister-in-law. Soon Rishi learns about Pawan's lie and runs away with his Tanvi (actual Tanu). Tanvi reveals that she is Tanu and marries Rishi. Ahana reveals to the Bedi family about Pawan and Bani's lies. Pawan is jailed and Raj curses Neha to be unhappy throughout her life. Neha (who wants revenge against the Bedis) lies to Sandy (her boyfriend) that Rishi molested her, so Sandy tries to kill Rishi. He shoots him but Tanu takes the bullets and dies in Rishi's arms. Rishi is shattered by Tanu's death. Rishi imagines talking to Tanu's soul that Tanu will return and waits for her. Tanu is reborn as Sandy's niece. Rishi drives his car fast and falls down from a cliff.
20 years later
Tanu has reincarnated as Tanuja (Sandy's niece) and lives in Amritsar with Sandy (her uncle). Sandy is still in guilt for killing Tanushree. On the other hand Rishi has lost his faith in love, hates women and is a tough person and Businessman. Ahana and Manpreet are married and they've two children named Smiley and Chintu. Yuvraj and Divya has a son Nakul. Neha and Sandy are married and also have two daughters named Nidhi and Vidhi. The Bedi family now hates Bani and her family members. Neha and Bani trick to send Nidhi, Vidhi and Tanuja to the Bedi house. When Tanuja comes to Mumbai and she feels connected with the city. Tanuja's past life starts to haunt her. Tanuja, Vidhi and Nidhi are sheltered at Bedi House, as per Bani's trick. Tanuja tries to find a job and she gets a job in Rishi's company. Tanuja becomes his secretary. Rishi starts to hate her, not knowing that she is his secretary. Vidhi and Nidhi are on a mission to attract Nakul for the family's fortune. Tanuja feels a special connection with Bedi house and family members. Rishi meets with Tanuja. On the day of Ganesh Chaturthi, a fire breaks out at Bedi house, Rishi gets hurt and Tanuja's face gets burnt badly while saving him.
3 months later
Tanuja gets Tanu's face, whose photo was mistakenly given by Biji to the doctor, leaving Bedis shocked. Rishi believes that it was Tanuja's plan. Tanuja realises her feelings for Rishi but he hates her believing her a gold digger. Rishi decides to marry Malaika (the girlfriend of a business rival of Rishi) to avoid Tanuja, but Raj learns about her affair as he sees Malaika entering a hotel room with a man. Raj reveals the truth to everyone but no one believes him. Everyone believes that he was hallucinating because of his illness. Malaika pretends to be a well wisher of Rishi only to get revenge on him for destroying her boyfriend's business. Raj tricks Tanuja to marry Rishi in order to save him from Malaika. Rano and Malaika tries to create distance and misunderstandings between them. They find a medical report saying Tanuja is pregnant which shocks everyone and tags her characterless. Later, it is revealed that it was actually Smiley who was pregnant with her boyfriend Rohit's child, and in order to save Bedi family's reputation, Tanuja pretended to be pregnant. Rishi eventually realises his love for Tanuja and they consummate their marriage. Rishi exposes Malaika and threw her out of the house. Next day, Tanuja falls down of stairs and faints. Bani misleads the police that Bedis tortured their daughter-in-law for dowry and gets them behind the bars. Again Rishi misunderstands Tanuja thinking that she did this on purpose to get revenge on Rano and throws her out of the house. Tanuja, then, meets with an accident and remembers her past life as Tanushree. Seeing Tanuja in so much pain, Katyani tells Tanuja that she is a bad luck for Rishi, so Tanuja asked for divorce saying that Rano doesn't want her in the family or the house. Purab Bohra (Raj's illegitimate son) demands 51% percent shares in Bedi property as compensation from Raj. Raj, in order to save his family from his illegitimate son Purab, gets the Bedi property on Tanuja's name by forging Rishi's signature. Now Tanuja runs the Bedi house and acts like a money sucker in front of the whole family including Rishi. Rishi tries to get the property papers signed from Tanuja but fails every time, and also gets close to Tanuja in the process. Rishi agrees to get engaged to Netra (Rano's friend's daughter whom she brought into Bedi house to replace Tanuja) to make Tanuja jealous and also for Rano's sake. Rishi continues to flirt with Netra in order to make Tanuja jealous. Divya has joined hands with Purab and conspires against Rishi and Tanuja. Rishi overhears an argument between Tanuja and Rano and misunderstands that Tanuja is a gold digger. Tanuja finds out that Katyani lied to her and confesses her love to Rishi, but he does not believe Tanuja. Tanuja vows to convince Rishi but is shocked after seeing Rishi and Netra together in a bed (which was actually Netra's plan to create misunderstandings). Tanuja leaves the Bedi house and Rishi tries to stop her but during the argument, due to the allegations Tanuja made against him, Rishi slaps her. She breaks all ties with him and boards the train. Tanuja finds out that she is pregnant with Rishi's child and tries to stop the train and inform Rishi but remembers the deception Rishi and Netra gave her together and decides to raise the child on her own.
7 years later
Rishi is now a successful business tycoon. Yuvraj and Divya have settled in USA. Smiley is married to a nice guy. Rishi adopted Smiley's daughter, Tanya. Netra requested Rishi to let her act as Tanya's mother in the society. Rishi has a business rival named Abhishek Khurana with whom Tanuja is raising hers and Rishi's daughter named Natasha in London, whom Natasha assumes as her father. Abhishek reaches India with Natasha and Tanuja to make business deals with Rishi. Rishi and Abhishek become business partners. Rishi meets Natasha as Abhishek's daughter, unaware that she is his child, as she is enrolled in the same school as Tanya. When Rishi comes across Tanuja, he is disheartened believing that she is Abhishek's wife and that they have a daughter together. Still Rishi tries to convince Tanuja to leave Abhishek to live with him along with Natasha.
After school, Natasha meets an accident and gets hurt. Rishi donates his blood to Natasha. Rishi stops pursuing Tanuja after seeing the bond between Abhishek and Natasha. But after finding the reports of Natasha, Rishi's doctor friend gets suspicious and does a DNA test and tells Rishi that he is Natasha's real father. Rishi confronts Tanuja who refuses to return. Abhishek, who now loves her, discovers her past with Rishi. Rano files a case for Natasha's custody. Meanwhile Tanuja and Abhishek fight against the Bedis for Natasha's custody, it's revealed in front of everyone that Tanuja did not marry Abhishek. As it can weaken her case against Bedis, she decides to marry Abhishek. But Rishi stops the wedding by proving that they are not divorced yet. Natasha learns that Rishi is her father. Natasha tells the court that she wants to live with Rishi and Tanuja. Tanuja starts to live at Bedi house with Natasha after the court hearing, while she also tries to accept Netra. Netra gets insecure of Tanuja. Upon clearing all the misunderstandings created by Netra, Tanuja reconciles with Rishi. Heartbroken, Netra arranges a trap to kill them. Abhishek finds out but is late to inform Tanuja. Tanuja dies and in grief, Rishi also commits suicide. Netra gets her jailed for her crimes.
25 years later
the story leaps forward twenty-five years. In this new lifetime, Rishi’s soul is reborn as Ranbir Kapoor, a celebrated footballer born, raised and living in Canada. By a twist of fate, Ranbir is not only Rishi’s reincarnation but also his biological son, conceived through preserved sperm just after Rishi's death. Tanuja’s soul returns as Kritika Kohli, a principled and compassionate young woman raised in Punjab, who grows up to become a lawyer. Neither of them remembers the love they once shared, and they live in completely separate worlds.
Fate, however, has other plans. Ranbir travels to India for a football event, and his path crosses with Kritika’s in ways that neither can ignore. At first, their meetings are marked by misunderstandings and sharp words. Ranbir sees her as stubborn; Kritika finds him arrogant. Yet beneath the surface, there is a strange familiarity — a pull neither of them can explain.
Circumstances bring them together when Ranbir is falsely accused in a scandal that threatens his career. Kritika, working as a lawyer, initially stands against him, but as the truth unfolds, she realizes he is innocent and fights to clear his name. Through these trials, their animosity gives way to trust, and trust slowly blossoms into love. Ranbir begins to openly pursue her, while Kritika, though hesitant, finds herself drawn to him in ways that defy logic.
As their bond deepens, hints of their past-life connection appear in moments of unspoken understanding, shared glances, and an unshakable sense that they have known each other forever. Their souls recognize what their minds cannot.
In the final moments, Ranbir and Kritika recover their past-life memories, recognise each other, confess their love and unite, fulfilling the vow they made as Rishi and Tanuja — the Kasam Tere Pyaar Ki. The series closes on the idea that true love is timeless, surviving death and rebirth to find its way back again.
