This film is the belief that the protagonist Siddharth Ray comes to realize as he rediscovers bonds of friendship on his return to India from New York after 12 years. The film travels with Siddharth as he explores equations with his past to rebuild friendships with his four friends whom he grew up with in a small town in Himachal Pradesh in India. Unraveled in a genre similar to Cinema Paradiso, a large part of the film happens in flashbacks about that one summer that changed Siddharth's life forever. The film shows Siddharth, as a successful, computer engineer based in New York City. He owns a big software company but leads a lonely life. One day, suddenly, his mother passes away and he is forced to make a journey back to India. As he travels back to his hometown from the US, he remembers the most important summer of his life. The summer of 1996. In a flashback we see Siddharth as a simple guy in a small town, who loves writing poetry, he hangs out with his friends Tino, Bobby, Susheel (Suzy) and Sam, all of whom form the Kasauli Cowboys. Sam is the larger than life extroverted hero of the gang and he is also Siddharth's best friend. As the summer unravels we see Sid, Sam and the boys enjoy a rollercoaster ride, experiencing the agony and ecstasy of growing up. We see their world through Siddharth's young eyes as he chronicles everything in his diary, forming enviable bonds of friendship, trust, jealousy and love. During that summer a young girl called Nayantara and her sister come into town. Siddharth falls in love with her but is too introverted and shy to commit. The girls join the group, triggering off a complex chain of events. The summer now unfolds more dramatically as the boys make detrimental choices - of love, sex, friendship, jealousy, heartbreaks and betrayal, finally leading to broken bonds of friendship. When Siddharth lands in India from the US, ghosts from his youth loom up. He finally overcomes the complications and sets right all the wrongs done in his past and rediscovers the bonds of friendship. In the end Siddharth goes back to New York a better man; reconciled with his past and most importantly, rediscovering a happier today. He returns to New York with the belief that friendship is indeed like Purani Jeans, the older the better.