In Guanajuato, a piano teacher delays her marriage to an engineer not to let her younger sisters alone. As he is love with her voice, he is mistaken for a sister whom he marries. The teacher then goes to the capital. There she becomes part of a family of young students, who believe she is the mistress of his father, so she suffers the scorn and reproach. Over the years the parents die and she renounces to the inheritance they leave her.
Libertad LamarqueYolanda
Carmen MontejoLeonora
Miguel TorrucoManuel Iturbide
Joaquín CorderoJorge - adulto
Elda PeraltaMarta
Tito JuncoIngeniero Raúl Fuentes
Yolanda VarelaSilvia
Tito NovaroJosé Eduardo Pacheco
Dolores CamarilloMargaritaJuan Orraca Jr.Andrés niñoNicolás Rodríguez hijoJorge niño
Bárbara GilEsther
Armando AcostaEspectador juicioEduardo AcuñaTomás (mayordomo)Daniel ArroyoInvitado fiesta