A terrible curse blankets the kingdom in shadows, thrusting it into utter despair and erasing all light. One day, a maiden appears from the north and chases away the darkness, reintroducing light across the land. However, after taking in all the shadows, the maiden is consumed by evil, allowing it to flood out of her body. In a final attempt to seal that which escaped, the maiden locks herself away.

The king, driven by fear, demands the death of the maiden to save his kingdom. Many warriors journey forth in an attempt to slay the maiden, but the darkness curses all who dare to encroach, creating an even greater evil that consumes the kingdom. Take up arms as the next brave warrior to save the land and expel the shadows!

Choose between one of five origins: the lives of people who fell just short of becoming heroes, all with different skills and abilities. Inherit one of their bodies as your own and begin your heroic journey. The Heart of Darkness has multiple endings depending on the origin you choose and the decisions you make throughout your adventure.

Enjoy quick turn-based battles where strategy and choice of allies are key! Find Shadow Souls—the spirits of warriors past—and enlist their aid in battle! Each has its own unique backstory and abilities and can be swapped out freely.

Throughout your adventure, meet both friends and foes also exploring the Sanctuary. Take on quests to lay low powerful beasts or track down family heirlooms for fallen noble houses. Manage the Doll's Repose, your base of operations where you can learn more about the world, craft new equipment, and expand the mansion to contain new facilities!