Sameer (Sameer Khan) lives a poor lifestyle in Bombay along with his mother, Ganga (Meena Kumari), and maternal uncle, Nekiram (Agha). While Nekiram works at a Petrol Pump, his mother paints pictures and statuettes of Hindu deities. Sameer grows up, becomes an Engineer, and lands a job with Khosla Enterprises, which is run by Chairman Gopaldas Khosla (Rehman), where he proves his abilities and is soon promoted as Chief Engineer, gets bungalow to live in as well as a fancy car. He meets with Roshni (Mumtaz), the daughter of Gopaldas, both fall in love, and soon get engaged. His idyllic lifestyle is shattered when a rival businessman, Chaganmal, alleges that Sameer's mother was actually Gangabai, a Lucknow-based Courtesan, who was never married, and that Nekiram is not his maternal uncle.
