Nina, engaged to a French captain, and Nancy, engaged to a doctor who runs an insane asylum on an island, are friends. When the doctor catches Nancy kissing the captain, known for kisses with a "heavenly kick," he breaks the engagement. In an effort to win back the doctor for Nancy, Nina pretends to be a bit "off" and becomes an inmate of the sanitarium, where she joins in the merriment with the other inmates, chasing in and out of rooms, and shimmying. By the time Nancy and her friends arrive at the sanitarium to see what is going on, it is too late, for Nina and the doctor have fallen in love and will marry.