Orphaned brothers Prem and Rajesh live with their uncle Kailashnath. Rajesh manages the family business and his family is on the look-out for a suitable bride for him. One day, Kailashnath meets his college friend, Siddharth Choudhury, who is now a professor, after several years. Siddharth and his wife have two daughters named Pooja and Nisha. Siddharth and Kailashnath arrange a marriage between Rajesh and Pooja. From their first meeting, Nisha and Prem start bickering lightheartedly with each other and the fun and mischief continue throughout Pooja and Rajesh's wedding.
Pooja and Rajesh's marriage brings much joy to the entire family and, eventually, they are expecting their first child. Pooja's parents are unable to attend her baby shower, so they send Nisha instead, who is present at the birth. During that time, Nisha and Prem fall in love with each other, but keep it a secret. Pooja's parents finally arrive to celebrate their grandson's birth, and spend time with the entire family. When the time comes to part, their hosts are dejected, especially Prem. He and Nisha promise each other that they will soon reunite forever.
Pooja visits her parents' house and Prem takes her there. When they arrive, Pooja learns that Prem and Nisha are in love and gives Nisha a necklace as a token, promising to get them married. Shortly afterward, Pooja accidentally slips, falling down the stairs, and eventually dies from a head injury. Everybody is shattered by the tragedy.
Nisha takes good care of Pooja and Rajesh's son. Hence, Siddharth and Kailashnath decide to have Nisha marry Rajesh. Nisha overhears her parents talking about her marriage into Kailashnath's family and thinks that they are discussing her marriage to Prem, to which she agrees. Later, at a pre-nuptial ceremony, she finds out that she is actually going to marry Rajesh. Prem and Nisha vow to sacrifice their love for Rajesh and his son.
Moments before the wedding, Nisha asks Prem's dog Tuffy to give Prem the necklace that Pooja had given her, along with a letter. Tuffy exits Nisha's room and delivers the letter to Rajesh instead of Prem. Rajesh reads the letter and realizes that Prem and Nisha love each other. Subsequently, he confronts both Nisha and Prem and steps aside, asking the elders to let them marry. Nisha and Prem marry each other with the consent of their families.