Catherine Ashbourne believes she is the spoiled mistress of Blood Manor, pampered by her impossibly devoted butler, Alex Prescott. Then four mischievous imps appear and reveal a terrifying truth: Alex is not a servant, but the final boss of a deadly Nightmare Trial. They insist Catherine is only a fragile pet, destined to be discarded when the real heroine arrives. Frightened yet unable to resist Alex’s tenderness, Catherine begins searching for a way out. But every escape leads her deeper into the manor’s secrets and closer to the monster who may have loved her all along from the very beginning.