‘Chhoto Saheb’ is the love story of Rahul and Rima. Rahul is a rich businessman who is raised by Mr. Dasu after his father’s death. Mr. Dasu had dedicated himself to raise Rahul and take care of his business. Rima comes to Kolkata from Tatanagar and falls for Rahul’s charm after watching his performance. But her cousin warns her that Rahul doesn’t entertain girls. Rima challenges to prove her wrong. Rima manages to win over Rahul with her charms and both fall madly in love with each other. Just when they’re about to get engaged, Mr. Mazumdar Rahul’s accountant calls Rima and tells that Rahul is a womanizer who ruined the lives of many girls. Rima goes away from Rahul so that she can test him. Rahul resorts to alcohol and stops going to work. Dasu tries hard to persuade Rahul and Rima but her fails. Rahul dedicates himself t service of mankind. Rima’s cousin visits her and tells her about Rahul. She understands her mistake and comes to Kolkata. But in the mean time Mr. Mazumdar sets Rahul’s factory on fire. Dasu gets fatally injured and succumbs to his injuries. But, he unites the lovers before he dies.