Teresa and her team investigate in Val Resia, where they discover that the Sleeping Nymph painting is linked to a Resian woman whose descendants they meet. Marini identifies two suspects at the crime scene and, returning to Udine, makes a discovery.

Teresa, reviewing the footage from the cameras, detects details of a conversation between Emmanuel and Marta. Meanwhile, Diego goes into the woods alone to face the monster. From a further examination of the painting, the footprints of Emmanuel as a child are detected, perhaps an unwitting witness to a murder. That same night, someone breaks into Teresa's house leaving an enigmatic clue.