In this dark fantasy, Scarlet finds herself condemned to eternal punishment in Hell for sins she doesn't remember. Satan offers her a deal: become his grim reaper, killing one sinner each day in exchange for her freedom. When Scarlet saves Chase's life during a robbery, she reveals her grim reaper role, and Chase shares the events that earned him his sinner's mark. Together, they form a partnership to target the worst sinners, using Chase's detective skills to bring them to justice. However, their moral choices come with a cost, and Satan isn't willing to let Scarlet's loyalty slip away easily.