In a post-apocalyptic world destroyed by chaos, humans and demons coexist. Darcy Hazewood is killed brutally but is reborn with special powers from a Devil System, and the system grants her powers. She wants a quiet life, so she builds a home deep in a forbidden forest and starts farming.
Demons soon invade her peaceful land. At first, she fights to protect herself, but then she becomes obsessed with killing every demon she crosses paths with. She discovers that this world is actually a alternate version of her own and that she caused the destruction.
She now faces a choice: accept her role as the cause of the apocalypse or find out more about her past and try to change her destiny.