 Ana Belén agrees to help the police catch Mejías when she finds out he killed her previous boyfriend and head of  Cordón Latino . For her protection, she moves in with Nelson and his wife. Meanwhile, Castilla s relationship with Raquel heads to a crisis when Internal Affairs suspect she may have been the one who warned Narcea about the investigation. Also, a key witness  wife in a high profile case is assaulted, but Mikel and Pascual were guarding the building and didn t see anyone enter.