Andres Vargas is a police inspector who dies chasing the "Midnight Butcher", a serial killer who has murdered five women. Vargas will have the opportunity to come back to live, but five years later and in Manuel Marquez's body, another police officer. In his resolution to apprehend the "Midnight Butcher", Vargas, now Marquez, will have Susana as a partner, a young policewoman. Between them there is a very special relation and together they will deal with this murderer who starts killing again five years later.