Rani maa (durga khote ) is the step mother of pratap singh (ashok kumar) they both are rivals and have put their candidated for upcoming elections against each other. Pratap singh's wife parvati (bina rai) is unable to coneieve and hoping for child. On the other hand, rani maa's widowed daughter in law is pregnant. Rani maa's thinks that pratap singh is behind her son's death. And expects her daughter in law to give birth to a son so that when he will grow up he takes the revenge of his father's death. And he can get the whole property. On the other hand, pratap singh is angry on parvati's brother dr. Bharti (rehman) who supports rani maa's candidate. Pratap even throws parvati out of the house when he learns that she is in touch with her brother. Parvati leaves the house in the pregnant condition. Rani maa's daughter in law (purnima) cames from home. Leaving raani maa in a big shock parvati gives brith to a son. Dr. Bharti brings a newly born baby from his hospital which is left by his mother. Parvati accepts the orphan as treats as her own child. After few days pratap comes to claim his son and by mistake takes away the orphan kid. Dr. Bharati reveals the secret that the orphan kid actually belonged to rani maa's family. Rani maa's daughter-in-law is the mother of the child. She takes a promise from bharti not to give his child to rani maa and dies in pregrancy. Parvati decides to keep a mun to end this family rivalary. Pratap singh when unable to take care of the child calls parvati again. Parvati comes with her real son and takes that he is the son of some poor man. Pratap singh agrees to raise the child but reals him like a servants kid. Years later, parvati's son is grown up named sonu (kashinath) and he is still unaware that he is the real son of parvati & pratap & the other kid shankar (dileep raj) is known as chhote sarkar sonu & shankar are best buddies-sonu loves a village girl named saguna (tanuja) and shankar is in love with his collegemate sina(mumtaz). Shankar goes to his daadi maa for patch up but she insults him. Sonu is thrown out of the house when pratap dearns about his love affair with saguna. Sonu villager identifies sonu as the orphan to whom rani maa's daughter-in-law had given birth. When pratap discovers that he tries to kill sonu. Parvati gathers courage & tells pratap that sonu is his actual son. Rani maa when comes to know that shankar is her grandson, she comes to claim him. But shankar changes her mind & resolve the differences between the two families.