Young girl Luna is traded by her gambling-addicted father to settle debts. She is sent to Wolfthorn Manor, tangled with thorny wolf-vines, as an offering to Fenris, the manor lord. Centuries ago, Fenris was betrayed and buried alive by villagers, reborn as a ferocious Wolf King.
Fenris wears a shattered iron wolf mask. Solitary and insecure, beneath his venomous black blood lies a gentle heart. Trapped alone within the shadowy manor, Luna fears not his wolf form. Her tenderness slowly melts his century-long loneliness, and the two fall in love.
However, the hypocritical Father Thomas unites the villagers to repeatedly besiege the manor, greedy for riches and determined to destroy Fenris. Together, they fight against the corrupted priest and parasitic demons. After brutal battles, they eliminate the source of all evil.
Peace returns to the world once the conflict ends, yet danger lingers in the shadows. Father Thomas survives and plots his comeback, and a brand-new crisis quietly looms on the horizon.
