Warrior supreme Guts, the Black Swordsman, has seen better days and more popular in the kingdom of Midland, a land he once defended as captain of the Band of the Hawk. But the Hawks were betrayed and slaughtered, and now the hyolier-than-thou Holy Iron Chain Knights have captured Guts and plan to whip some repentance into him literally. But Guts isn t so easily held at bay, at when he manages to escape with the Holy Knights leader, Farnese, as his hostage, the demons that are drawn to Guts Brand of Sacrifice are all too willing to show her the teeming darkness in her own soul "

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...

What Guts the Black Swordsman and his companions had seen as an island refuge for monstrous sea creatures and the ghost ship of the demonic Bonebeard is, in fact, the very lair of the malefic sea god that controls them. With no avenue of escape, Guts must once again don the Berserker armor to give his company any chance of survival. But without the protective influence of the sorceress Schierke, Guts risks being forever lost within the cursed armor and becoming an even greater threat to his comrades