Amit (Amitabh Bachchan) hails from a simple middle class family. He falls in love with a dancer/musician, when she is performing and ultimately gets married to her (Rekha). However, she is very ambitious and dreams of making it big.
One of Amit's friends Mr. Ranjit Mallick comes from the U.S. He soon learns of her weakness for material things and takes advantage of that. He fuels her ambition and makes her a big star, but ruins her married life in the process. He also tries to kill Amit.
Amit survives but loses his memory. He lives with somebody for eight years. Thereafter he again meets with an accident and suddenly he remembers everything before those eight years. He comes from Bombay to Calcutta. He gets friendly with a director and finances a movie with Rekha in it who is now called Sunita Devi. The story written by him apparently is his own and Rekha's story. It was his way of taking revenge on Ranjit. Ranjit finally goes to jail and Rekha realizes her mistakes and gets back with her husband.