Gerardo Roquer's father sends his son, who is much more interested in nightlife and vaudeville chorus girls than in textbooks, from Madrid to the University of Santiago de Compostela to force him to study. Gerardo ends up staying at the "Casa de la Troya" boardinghouse, where he befriends other students and falls in love with the beautiful Carmiña Castro. But her aunt and uncle don't approve of their love; they prefer the foppish Octavio (to whom they owe a debt).