 Jimmy Hanley (Dennis O Keefe) learns that his former dancing partner has been killed, leaving a baby boy Sandy (Sandra Lee Henville as Baby Sandy), so he takes the baby to live with him and his roommate Boris Bebenko (Mischa Auer). Theatre manager Allen Rand (Donald Briggs) threatens to fire Jimmy for neglecting his work, but Jimmy s girlfriend Diana (Shirley Ross) squares things by going to dinner with Rand over Jimmy s objections. Sandy catches measles and the quarantine causes Jimmy and Boris to miss a big audition.