In a world where only Heroes can level up—by absorbing life energy from monsters or other Heroes—fifteen-year-old Arriel discovers he's one of them after a routine quest. Thrust into a dangerous world of hidden powers and hunted potential, he must survive alongside a spear-wielding friend and a mysterious mage girl who may be more than she appears. As darker Heroes begin to surface, Arriel faces a harsh truth: to protect others, he might have to become a killer himself.