After a hellish battle against ravenous sea monsters, Guts the Black Swordsman and his companions are forced to seek refuge on a small island so that their ship can be repaired. But this island is not the safe haven they?d hoped for ? it?s a sinister place rife with dark energy, watched over by an ancient, vengeful god. And with a full moon on the rise, that god?s power is about to be unleashed...