Former secret agent Anacleto (Imanol Arias) comes out of retirement when his arch-enemy Vázquez (Carlos Areces) escapes from prison and promptly targets Anacleto's son Adolfo (Quim Gutiérrez), who accidentally discovers his father's double identity and finds himself forced to co-operate with him to survive Vázquez's quest for revenge while trying to win back the heart of his ex-girlfriend Katia (Alexandra Jiménez).