The film's female lead, Naina Preity Zinta narrates the story. Her father had committed suicide years ago which left a deep impact on her heart. Her family is dysfunctional since her mother and grandmother just cannot stop arguing. But when Aman Shahrukh Khan arrives next door, the whole gloomy conditions change. Aman infuses life in skeptical and overtly serious Naina, and she falls in love with him. But Aman knows that he cannot marry Naina because of a secret which he cannot divulge to her. So he intends upon setting her up with her best pal Rohit Saif Ali Khan.
Naina {Preity Zinta} is a young woman, slightly ticked off for reasons more than one. His father committed suicide when she needed him the most, leaving Jennifer{Jaya bachchan}, his wife all alone. Lajjo{Sushma Seth}, Jennifer's mother-in-law blames Jennifer for the same. furthermore, Jennifer is unhappy because Lajjo refuses to accept Gia, a 6-year old girl whom Jennifer adopted. Even the restaurant Jennifer is running is not going great guns. in short, nothing is well on the Kapur family front. the only factors that redeem Naina's existence are his toiling and tolerant mother Jennifer, and her bumbling stumbling MBA classmate Rohit {Saif Ali Khan}. Meanwhile, Aman{Shah Rukh Khan}, a happy-go-lucky guy arrives in Naina's neighbourhood and soon changes everything around, thanks to his contagious joviality and jest for life. He proves to be the messiah for the Kapur family in every sort. Naina is not a happy camper initially but could remain unaffected by his charisma for long, and falls in love with him. On the contrary, some platonic moments arouse Rohit's fondness for Naina a bit more and he's in love too. But when Naina thinks of confessing her love to Aman, she realises that Aman is a married man. its only later when we find out that Aman lies because he is a heart patient and has a limited life to live. But since Aman loves Naina too, he wants some one's love to embrace Naina after him for which he finds Rohit suitable. Rohit who took no time to move after some pain, is somehow coaxed by Aman to re-think about his relation with Naina. Aman plans a strategic set of efforts and brings Rohit and Naina close. But when Naina finds out the truth, what follows is a complex string of pangs of helpless love. Aman meets his decided fate, but not before changing Naina's life forever.
Naina is a very serious girl with a very serious life. But one day, her soul is awakened by the happy-go-lucky Aman, who teaches her that life is meant to be lived. Naturally, she falls in love with him. But Aman is harboring a secret that keeps him from reciprocating Naina's love. But he cannot stand having her live a life without love, so he sets off on a mission to fill her life with someone else's love - someone she already knows....
Naina and Rohit are best friends. When Aman comes into their lives, their worlds are turned upside down. Aman tries to play matchmaker between them and succeeds as Rohit falls for Naina. However, Naina falls in love with Aman, who although also in love with her, rejects her love. Meanwhile, Aman goes around fixing Naina's family problems.
Naina Kapur is the eldest of three and currently doing an MBA course in New York City. Her coursemate Rohit is a playboy wannabe who fails more than he succeeds, and the two befriend each other since she's one of the few women he doesn't plan to court. Naina lives with her mother and her paternal grandmother who, in essence, is your stereotypical mother-in-law. Not everything is going smoothly for the family. Their restaurant business is constantly in the red and family squabbles between the two in-laws are constant. However, the Kapur family still maintains their status quo, even if the children are unhappy about it. Enter Naina's new neighbour, Aman Mathur - a charismatic busybody who gets into everyone's face and then gets away with it. He brings a new life to the neighbourhood and slowly but surely begins to change the lives of everyone around him. He pushes people to become the best that they can be, and even gets Rohit spurred on enough to court Naina seriously. That is, until he realises that he's falling hard for Naina as well. And to complicate matters, Naina has also fallen for him.
Rohit and Naina are sweethearts and hope to marry soon. Their relationship undergoes a change when Naina's family experiences money problems. Then Aman Mathur enters their lives, and his dynamic and outgoing personality has a positive effect on everyone he comes into contact with. But Aman himself is human, and cannot help himself falling in love with beautiful Naina. But Aman cannot marry Naina for he has dark secret, that he cannot share with anyone.
Kal Ho Naa Ho Preview
Kal Ho Naa Ho is the story of three friends whose relationship is based on unconditional love and emotional empathy with each other.
The setting is New York in present times. Life is quite brooding for Naina Catherine Kapur (Preity Zinta). The cause of her sombre lifestyle is a family tragedy that shook her world and took her happiness away.
Her humdrum daily routine includes her chores in her half Punjabi-half Catholic household in which she has to deal with a short tempered grand-mother, has to look after her little sister and brother besides helping her mother Jennifer [Jaya Bachchan] deal with the family's financial troubles. In short, life could not be drabber for this gorgeous belle.
But things change with the coming of Aman Mathur [Shah Rukh Khan] into the tiny Indian neighborhood where she lives.
Aman is an extrovert person who gets friendly with almost everybody and begins to win everybody's heart with his jolly nature. When he sees the sadness in a young and beautiful girl like Naina, he sets about to bring happiness into her life.
For this he also gets help from his good friend Rohit [Saif Ali Khan], an eligible Manhattan bachelor.
After few initial failures, the two manage to bring Naina out of her dull and gloomy moods and make her genuinely happy. The three become very good friends and every thing is hunky-dory.
But this happiness is short-lived when it turns out that one of them suffers from a deadly disease.
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