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The corpse of a young man appears in an abandoned factory in the center of Madrid. The victim has a scar on the abdomen, as if an autopsy had already been performed before. What inspector Mario Carrasco and Macarena Valverde, the deputy inspector who joined the homicide unit that same morning, cannot imagine is that when Dr. Leal from the Forensic Anatomical Department reopens the body, he will find something that should not be there...