The story presents the achievements of the Student Union Singers during the Rengasmatka revue, both on stage and off stage. The performance is organized to raise funds for the choir's trip to America, which is being organized by Risto and Kale. The evening is colored by travel tickets that have fallen into the wrong hands, which the travel agency girls Mirkku and Kikka are feverishly searching for behind the stage.

Private Tossavainen and Corporal Konstila end up cleaning the apartment of Captain Kulma, their company commander, while trying to avoid outdoor duty. The neropats compete for the attention of maid Maiju when Captain Agatha's aunt, who has spent her life at sea, arrives for a visit with her foster daughter Emma, turning the entire barracks upside down.