Marina Quiroga, a daring upper-class girl with a detective's soul, sets off to catch the serial killer that has been terrorising her town with her faithful butler Hector's help.
EPISODE 1
Episode 1
Marina Quiroga, a girl from high society, leaves the party for her brother's appointment as police chief to fetch magazines from the black market in the port; when she arrives, she discovers something completely unexpected.
EPISODE 2
Episode 2
Following the threats that Marina receives from the killer, Arturo puts guards in charge of his mother's house to protect her but also to prevent her from investigating again; the case is brought forward by Pablo and Ramirez.
EPISODE 3
Episode 3
Arturo is forced to publicly admit the existence of a killer on the loose after that same killer escapes right under his nose; the police station is flooded with calls and false leads.
EPISODE 4
Episode 4
After the murderer's arrest, Asunción throws a big party to celebrate the awarding of a medal to Hector for his bravery. They all seem happy except Marina, who realises how hard it is to give up her dreams.
EPISODE 5
Episode 5
After being kidnapped by the killer, Marina wakes up to find that she has been taken to a remote forest to be killed; she doesn't make things easy for the killer and devises an escape route.
EPISODE 6
Episode 6
Now that they finally know where the last girl of the Blue House is hiding, the protagonists run to find her before the killer does; when they arrive at the cabin in the woods, Margó receives them with a clean shot.
Ángela Molina
Álex García
Gorka Otxoa
Aura Garrido
Jean Reno
Tito Valverde
David Pinillos
Maria Ripoll
Daniel Aranyó