The Chosen: Well Of Souls is an action role-playing game (RPG) in a dark period of the 19th century. The story revolves around 3 characters: Frater Simon, Elena, and Tong Wong (respectively mage, thief, and warrior), who are members of the Mystery Guards Fraternities, organizations devoted to exterminating demons and dark forces. They are now after an immortal sorcerer, Marcus Dominus Ingens, who commands armies of demons, summoned with the souls of alchemists and is bent on destroying God's Envoy, a powerful being who appears every 200 years.

The powerful Sorcerer Marcus Dominus Ingens became immortal after unraveling the mystery of the Philosopher’s Stone. His pride and hunger for power made him eliminate all alchemists who's skills and knowledge equaled his. Now he keeps their souls in Golden Tanks and uses them for his evil purposes and controlling infernal forces. Whole armies of demons and devils are at his command. In order to take control over the world, however, he'd have to destroy the God’s Envoy, who resides at the Equilibrium Place -- the eternal throne -- to which every 200 years comes the being who has the great power of doing good. The God’s Envoy is deep meditative state and cannot directly intervene in the situation on Earth.

Marcus is aware that he is too weak to destroy the God’s Envoy, so he sets free hordes of infernal monsters in order to harvest human souls and later keep them in Golden Tanks. Each new soul makes Marcus more powerful, while the God’s Envoy becomes weaker and weaker. And then one day… For many years the Mystery Guards Fraternities have trained Hunters to fight the evil. Hard-bitten, well trained in magic and alchemy, they traversed the world fighting against the powers of darkness. Now, their Fraternities need them back to face the whole army of infernal beasts. The life of God’s Envoy and the world order are at stake.The best of the best Frater Simon, Elena and Tong Wong prepare to save the Earth ready to risk their lives in the fight against Marcus.