A woman blames a nightclub drummer for the suspicious death of her sister, and seeks revenge. However, the pair work together to solve the mystery and become romantically involved, after he introduces himself under another name.
A woman named Ruby is killed and her body is thrown off of the third floor of a building (4th floor in North America). The police are called in to investigate, and they are assisted by Anil, who was a friend of Ruby. The prime suspect in Anil's eye is Ramesh, who has been lying about his alibi, and also about his relationship with Ruby. But the police have a clue - a button from an overcoat, a button that is worth Rs.250, and it is more than likely that this coat belongs to the killer, who is very wealthy.
Written by rAjOo (gunwanti@hotmail.com)
This film originally had Dev Anand in the leading role, but following a spat between him and producer Nasir Hussain, he walked out of the film. When Shammi Kapoor was approached for the role, he told Nasir Hussain he would work in the film only if Dev Anand tells him personally he is not working in the film out of his own will, and that he is fine with him doing the film. That is what happened.
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