Danny Denzongpa had signed the film and sung a song in his own voice. That is when Johnny Walker walked into producer Atma Ram's office and demanded a role in the film . Johhny Walker and Atma Ram were best friends. Atma Ram then gave Danny's role to Johnny Walker and gave Danny another role in the film . The song sung by Danny was now to be picturized on Johnny Walker. Danny was to start shooting for his new role when he was told they replaced him with a much more known Sujit Kumar. This disappointed Danny but he understood as a newcomer these games were played.
The story is of an officer sent for an mission is acted very well by Dev Anand. The story is also of today, but nobody can act like Dev Saab did.
The movie was sensible and was ahead of its time.
Guru Dutt's brother Aatmaram has made this movie with Dev Anand, who had given break as director in Navketan's Baazi in year 1952.
The film was temporarily banned for a while due to the film being shot in forbidden locations ( Near Nepal). Due to political pressures, the film ran into controversy.