Humsaya

Shyam (Joy Mukherjee) is court-martialled for having committed a murder. He denies the charges but is stripped of his rank and de-mobbed. Professor Tao Ki Chen (Madan Puri) plays up to him and takes him to a shack near the India-China border. He overhears Chen talking to Lin Tan (Sharmila Tagore) a Chinese officer, who has had plastic surgery done to look like Shyam. The plan is for Lin to impersonate Shyam and try to get army secrets out. Somehow Shyam manages to kill Lin and pretends to be Lin