A terrorist attack in Spain surprises Daniel, a hitman who was hired to kill Monica, a Mexican woman who fled her country with her daughter, left her dark past behind.

Natalia calls her mother and tells her that she is fine, but uses an unusual phrase as a clue to make Monica understand that she is in danger.

Monica refuses to accept Daniel's help, but not finding enough support in the authorities, nor in Alex, Daniel becomes increasingly essential for her.

The photographs of the body of Prats are leaked to the press. Monica puts her life in danger by going after her daughter's kidnappers. Alex begins to suspect Daniel's intentions.

Daniel knows that Monica is in danger of death and is obsessed with protecting her. The key clue to Natalia's whereabouts is getting further. Natalia reaches her final destination.

Daniel is forced to confess the truth to Monica. Eli receives threats from Torres.

A mysterious yellow envelope arrives at the hands of Urrutia. Daniel and Monica go to the port of Algeciras. A new suspect of Beatriz Prats' crime appears.

Monica confirms Natalia's final destiny, while her daughter tries to escape. Daniel remembers the reason that led him to accept killing Monica. Velasco investigates his partner, Urrutia.

Natalia finds out who ordered her kidnapping. Velasco is convinced that Urrutia knows more than it seems. Alex writes a farewell letter to Eli.

Monica and Daniel arrive at the place where Natalia has been transferred. A gunfight initiates and Monica sees her daughter facing her kidnapper face to face.