Just because Rin is indestructible doesn't mean she can't be hurt. On her quest to remedy an ancient sin, a single act of casual cruelty sets off an avalanche of events which threaten to destroy everything. Rin must rein in her assistant, a man of fierce attachment and questionable conviction, while avoiding a devious ex-husband who will stop at nothing to reclaim her. In the balance lies her heart and the fate of the world.