A new case for detective Fermín Escartín! Escartín discovers that Elisa Lobo, the retired assassin, has returned to action for a new job. We don't know how but someone has convinced her to assassinate the president of Peru. Escartín travels with the son of Elisa to try to stop the assassination. As Elisa and Escartín were a couple for many years, if there's anyone who could stop this it has to be him, but will he solve this case?