Marina Quiroga, a daring upper-class girl with a detective's soul, sets off to catch the serial killer that has been terrorizing her town with her faithful butler Hector's help.
After discovering that the murders began thirty years before in Orense, Marina, Ramírez and Pablo go there to search for clues to the fleur-de-lis killer’s true identity; what they never realised is that all the while the killer has been closer to them than they ever suspected.