Krisnja has disappeared. Teresa, with the help of Alice and Smoky, manages to find her injured and she claims to have been attacked by Sandro, but Teresa is not convinced. She continues her investigations finding the place that Marta was looking for before being killed: Teresa puts together the pieces of this intricate case and manages to understand who the real murderer is.

Diego is found unconscious at the bottom of a slope, fueling several suspicions. In the photo found at home, Teresa recognizes a detail in the background that turns out to be crucial for the investigation: the killer left an intimate detail of Teresa's.

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.

Old Emmanuel disappears, leaving signs of a struggle and Diego's footprints in the house. Teresa discovers crucial details by questioning him. Meanwhile, the attraction between Sandro and Krisnja grows. Using Smoky's leash, Teresa tracks down Alice and, on the border with Val Resia, they make a macabre discovery.

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.

Policewoman Marta Trevisan is found dead in the woods of Val Resia, apparently a suicide. Commissioner Battaglia realizes it is a murder and, investigating with his inspectors, discovers that Marta owned a mysterious 1945 painting painted with human blood. But the investigations are complicated by the arrival of the new director, Albert Lona.