Nathan Grant, an Aussie student at Warrawul Boarding School, has a pretty normal life. A chance encounter with a flesh-eating Homunculus turns all that upside-down! Savagely killed by the creature, Nathan is brought back to life by the Alchemic Warrior, Astrid Rachelle. In so doing, she bestows upon him the powers of the Arms Alchemy his soul in weapon form. Determined to use this power to its fullest value, Nathan joins Astrid on a hunt for the Homunculi infesting his town, before his friends and sister become lunch.