Rupa mysteriously falls to her death from the third floor of a hotel. Before her fall, she bangs on the door of the hotel drummer Rocky, pleading to let her in. Her death is assumed to be a suicide. A year later, Rupa's sister Sunita believes the nightclub drummer is to be blamed for her sister’s suspicious death and intends to investigate and avenge it. But on the train journey to Mussoorie, Sunita meets a flirtatious Anil who is actually Rocky (his stage name). They become romantically involved. Rocky’s identity is revealed and together they crack the murder mystery.