Poornima (Amrita Rao) is an orphaned middle-class girl who lives with her Chinnanna (Alok Nath) and Pinni (Seema Biswas). Poornima's Pinni has been unable to accept Poornima as her own child as she is more beautiful than Pinni's daughter, Bujji (Amrita Prakash). Poornima's simple and affectionate demeanor touches the heart of Bhagatji (Manoj Joshi) who takes her marriage proposal for Prem (Shahid Kapoor), son of renowned businessman Mr. Harishchandra Prasad(Anupam Kher). In spite of being brought up in the fast city life of New Delhi, Prem is rooted to the ground and has retained his family's traditional values and upbringing. Respecting his father's wishes, Prem agrees to meet Poornima to get to know her better. What follows is a 'meeting' arranged by the two families. Prem and Poornima are suddenly in the midst of a situation they have never been in before. They discover their soul mates in each other and are engaged - to be married in six months. Prem and Poornima go through the most magical and romantic period of their lives. Six months fly by and just when everything is set for Prem and Poornima to get married... a crisis puts the love of Prem and Poornima through a trial by fire. 'Parinayam's a heart-warming tale of their unconditional love.