The boys are running a laundromat in the back room of Louie's Sweet Shop. A woman, Laura Andrews, comes in and leaves her baby in one of the laundry baskets and the boys find him. They discover that he is the heir to a fortune, and that his mother hid him so that her aunts couldn't steal the inheritance. After discovering the baby is missing, the aunts have Laura committed to a sanatorium for supposedly being mentally ill.
Meanwhile, a bunch of gangsters get wind of the situation and make a deal with the aunts to keep the baby away from the reading of the will. Sach and Slip sneak into the sanatorium under the guise of committing Sach where they help Laura escape. They make it to the reading of the will just in time and Laura and her son gain the inheritance and the aunts are arrested, along with the gangsters.
