The Stooges play three sets of identical triplets, born one year apart. All nine brothers lose track of each other after World War II, unaware that they are all living in the same city. One set (Moe, Larry and Joe) is single, one (Max, Louie and Jack) is married, and the other (Morris, Luke and Jeff) is engaged. Trouble brews when the engaged set of brothers decided to celebrate at a local nightclub. Before they arrive, the unmarried set show up, followed by the fiancees of their brothers. The ladies start hugging and kissing the unsuspecting brothers. Within minutes, the wives of the married brothers show up, thinking their husbands are cheating on them. Hilarity ensues when the nightclub waiter (Frank Sully) walks in and sees all nine brothers simultaneously.