Commissioner Leon (Miguel Angel Landa) investigates the murder of a woman in a population near the capital. The woman was raped before death and the case is complicated when his brother becomes the prime suspect, since it is a priest (Eduardo Serrano). Because of the implications that inquiries might have, Leon is pressured to keep the event as a "crab" (Cangrejo, or a unsolvable case), but he decides to comply with the law.

This is the story of two teenage women affected by violence and the painful journey to become full and liberated. One, Maruja is a young rape victim. The other Carmen Luisa is beaten by violence within her own family.

Tosca, the true story is a Venezuelan film released in 2001, based on the homonymous opera Tosca by Giacomo Puccini.