After Anna's death, Paoletto is relentless in trying to find out what Anna was about to tell him just before she died. Meanwhile, Cagliostro is also on the killer's trail, assisted again by Vanessa. A familiar trail challenges every certainty. After discovering that Levani was behind everything, Cagliostro and Vanessa are determined to make him pay. Will they succeed in their intent? And will Cagliostro finally find a happy ending beyond the Red Door?