Radhika Agarwal is an overweight but happy-go-lucky girl of a happy middle class Halwai family. Her grandmother wants her to marry whereas her cousin and best friend Kaya is an attractive girl who aspires to become model. Divyam Bansal, son of a wealthy businessman Jagmohan Bansal is a young, handsome man who is a fitness freak and a perfectionist who wants to marry a beautiful girl. Divyam and Kaya are in love.
Jagmohan and Ranjeet (Radhika's father) meet and are revealed to be best friends. They fix Divyam and Radhika's marriage with each other. Sujata (Divyam's mother) finds out that Radhika is fat and reluctantly agrees for the marriage. She believes Radhika is not fit for her son. Divyam wants to marry Kaya but she refuses to marry him. She makes Radhika believe that Divyam loves her and she falls for him. Kaya leaves for France. Finally, Radhika and Divyam marry.
After marriage Divyam mistreats Radhika and hates her because of her obesity but eventually appreciates her beautiful heart (Atisundar Man) and treats her well. Sujata hates Radhika for being fat. Eventually, Gautam a.k.a Golu (Divyam's cousin) marries Kali an illiterate, village girl. Kavita hates Kali. Kaya returns and becomes obsessed with Divyam. Sujata unsuccessfully collaborates with Kaya against Radhika. Kaya tries to kill Divyam but he is saved.
After a series of events, Radhika and Divyam confess to each other. Sujata brings Radhika's look-a-like who pushes Jagmohan from balcony. Jagmohan is paralyzed. Sujata convinces Divyam that Radhika tried to kill him and in anger he asks Radhika to leave. Distraught, Radhika leaves for Lucknow.
6 months later
Sujata brings Rani who takes care of Jagmohan who is paralyzed. Kali, pregnant with Gautam's child, miscarries. Radhika returns to Kanpur and reaches Bansal House as Jagmohan's caretaker. Radhika is shocked to see Rani as Divyam's fiancé. Divyam mistreats Radhika.
Rani fakes her pregnancy with Divyam's child. Sujata forces Divyam to marry Rani. Radhika doubts Rani. Initially, Rani usurps Jagmohan's property and brings her brothers Narpat and Sarpat who torture the Bansal family. Rani blackmails Divyam to marry her. Radhika and Divyam reunite, realising their love and in order to recover the Bansal's assets. After much commotion on the day of her marriage with Divyam, Rani brings a Tantric in order to get rid of Radhika. The Tantric brought both Radhika and the family near the brink of death, but finally Radhika saves her family sending Rani to Mental asylum on the auspicious day of Dussehra. Narpat and Sarpat realise their misdeeds and consider Radhika as sister. Radhika and Divyam reunite. Radhika and Divyam confess their love.
Divyam and Radhika adopt a baby girl who turns out to be Kali and Gautam's daughter. It was revealed that as it was a girl birthed by Kali, Kavita replaced it with a stillborn one. Kali learns the truth but stays quiet. Radhika reveals the truth to everyone. An angry Kavita reveals that she did this because her son was treated unfairly by Divyam. Thus, creating a chaos at Bansal house, Dadi divides the house, dividing the families. But Radhika reunites the family. Radhika and Divyam are again separated due to Sujata.
5 years later
Divyam is married to Ragini and has a son Sonu, but still remembers Radhika. Radhika, who now goes by the name Appu, has forgotten her past and has a daughter Laddu. They live with an evil woman who mistreats them. Appu is forced to work in a circus.
