Sixty miles off the coast of Star Gleam City lies a dark tower that rises high above the surrounding ocean. The tower, a prison constructed long ago, is known by only one name: Regret. Built to hold the most powerful wizards ever known, its powers are immense and not fully understood. Rumors abound that protecting the tower from intruders are two supernatural guardians, one in the water and one on land, that must be defeated before entry can be gained. But inside the tower is the only man that can help Quinton remove the mark of the damned that binds him to the Lord of the Underworld. Quinton must challenge the guardians and solve the ancient secret of the tower or risk becoming a slave to the Underworld forever. As he races to free the mysterious man, one of the guardians attacks him in a way he never expected, and he must fight to save both his hope and his heart before the Tower of Regret claims another victim.