Four of our contemporaries, by the will of mysterious forces, are transported to Osh - a world of permanent, dark and cruel Middle Ages, filled with dark magic and monstrous creatures. In this world, the soul is not an ephemeral substance, but a very real, tangible entity, possessing enormous energy and value. Regular absorption of souls grants not only immortality, but also the life experience of their previous owners. Absorbed the soul of a pyromancer - fireballs are at your disposal, the soul of a swordsman - the ability to fence is in your blood. But the world of Osh exists for many, many centuries, and its inhabitants never refuse to, on occasion, extend their lives by taking someone else’s. Hundreds, thousands of absorbed souls create monsters and demigods. Will our heroes be able to maintain their human appearance, not only morally, but also biologically?