When a person kills or commits the worst sin of their life while still alive, the angel's wings turn black. Mae Fuentes, an 18-year-old black angel, was murdered when she was only fifteen. She can't seem to recall the sins she committed while still alive. Selena, the grim reaper, has orphaned her and thus will watch for her in heaven. The heavenly committee decides to send her a task in the human realm one day. She needs to know who she really is when she's still alive in order to explain the color of her wings. The day before when she is being sent to the earth by God. Caroline, a friend of hers, advised her to be careful and offer her some charm for protection. On Earth, she met a guy which, with his friend, fights a gang. She seemed to have no idea that the boy she bumped into will help her find her real identity when she was still alive. but, not all are happy to let mae know her identity. Who is responsible for Mae's death, and why did she become a black angel?