In the pursuit of otherworldly ends, three young women have been drawn to a castle that appears during the full moon. Merlin has called to them in the night and they have followed the path he has prepared. But their true test is yet to come at the hands of the Lady Ursula! All indentured servants on the run, the girls must first prove their worthiness to the Lady, Merlin's consort and advisor, before going on to the real trial; that of proving their courage and fortitude in the castle dungeon. The Lady Ursula is a harsh and demanding woman. And Merlin's dungeon is no place for the meek or faint of heart. One on one, the weak are exposed and dealt with. Is there one among them that will survive?