Il musicista stregato

From the bottom of the Grado lagoon, an ancient stringed musical instrument has come to light, a dulcimer, which belonged to a famous musician, Giorgio Mainerio, known for the accusations of witchcraft that were leveled against him centuries ago. Father Alvise believes it is the dangerous "psaltheryum diaboli" and calls Harlan and his friends for help. Despite its long stay on the seabed, the psalter is intact. But playing it is very dangerous...