Jun Fudo is a phys-ed teacher and former athlete haunted by violent impulses she can't explain, until demonic creatures attack her students on a school trip and she transforms into Devilman Lady to fight them off. She joins the Human Alliance, an organization built to hunt down devil beasts hiding among ordinary people, and starts confronting how much of the violence inside her actually belongs to something not human. This manga is a spiritual sequel to Go Nagai's original Devilman.