El sacrificio del cordero

When in the life of a provincial prosecutor a seemingly harmless young man crosses paths, but who has turned murder into the macabre medicine that conjures up suffering and madness, the only way to survive, the only way to protect yourself, will be to let yourself be infected by his obsessions to understand and destroy him before he ends up with what he wants most. The threat is to become what you are trying to fight. The danger... not being in time to do it.