Chains of Sin tells the story of Slava, a young orphan living in a remote village in the northern part of Alazak, a kingdom in the Holy Light Faction. Amidst the great war between the Holy Light Faction and the Red Sun, Slava leads a simple life as a farmer, working on his landlord Tronos's fields. However, the world beyond the village, filled with magical creatures and warfare, is drawing nearer. When a mysterious stranger arrives in the village, bringing with him a captured magical creature, Slava begins to feel a change within himself. He finds himself caught in a grand conflict that will alter his fate and uncover darker secrets than he could have ever imagined.