Juan Carlos Thorry is a police inspector who must solve the mystery of the death of the warden of a boarding school for young women, for which he goes undercover as a music teacher. The main suspect is the mischievous schoolgirl María Duval. A series of entanglements leads the protagonists to becoming romantically involved and to finding the culprit.
A rich woman's personal secretary borrows an expensive piece of jewelry without permission for a night on the town... and then loses it. Based on a story by Guy de Maupassant.
