In a hurry, Will finds a set of doors and they find themselves in a large cell with mutilated bodies and mechanical objects. After breaking down the doors, Mrs Black addresses Will as a Shadowhunter and a fight ensues with the arrival of an unnamed shadowhunter and another man called Henry, whom Tessa bites in self-defence. In the chaos, Mrs Black is beheaded and Mrs Dark, who is later revealed to be an Eidolon demon, flees.