Widowed Mrs Lal lives with her two sons Ram and Ratan an unmarried daughter Sheela Rams wife Parvati and her children While Ram is employed in a mill Ratan is studying engineering in Calcutta When Ratan returns he is offered a job at the same mill falls in love with a Typist named Manju much to chagrin of Malti the daughter of the millowner Sewakram When Ratan finds out that Sewakram has been defrauding the employees he decides to form a union a move that is opposed by Ram who is very devoted and loyal to Sewakram