Suhaag is an action musical drama and a tale of a poor woman who is abandoned by her husband after giving birth to twins. As fate would have it the twins get separated in childhood with one left with the mother while the other is sold to a goon. Due to good values and upbringing, the child with the mother grows up to become an honest police officer (Shashi Kapoor) while the other brother grows up into a street smart ruffian (Amitabh Bachchan). Both become friends not knowing that they are siblings till fate brings them together.