The four legendary Sainted Heroes have been summoned to do battle against the growing forces of darkness and save the Kingdom of Calanthia from destruction.

And then there's Thomas. Accidentally summoned along with the heroes, he has no class, no abilities, and little hope of surviving in a harsh world populated by fearsome monsters. After being banished, he finds himself alone and in a desperate battle for survival.

In the depths of the catacombs running beneath the city, he discovers an ancient dungeon core shard, which grants him the power to summon foul minions to do his bidding. But his new powers come at a steep price, and he must quickly master his strange abilities while evading those hunting for him.

With few allies and numerous enemies, he'll have to do whatever it takes to escape from Calanthia and find somewhere safe—if such a place even exists.