After spending nine years on Dungeon and Stone, the role-playing game that no player has ever beaten, Hansu Lee finally reaches the dungeon of the final boss. As soon as he opens the gate, however, he suddenly sees a message that says his tutorial has been completed and finds himself in the body of Bjorn Yandel, a real barbarian within the game. An exciting adventure awaits him as he endeavors to abide by the laws of the fictional world.