After waking up in a morgue, an orphaned teen discovers she now possesses superpowers as the chosen Halo Bearer for a secret sect of demon-hunting nuns.

A 19-year-old woman wakes up in a morgue with a new lease on life and a divine artifact embedded in her back. She discovers she is now part of an ancient order named The Order of the Cruciform Sword, a secret sect of the Catholic Church that has been tasked with fighting demons on Earth, and powerful forces representing both heaven and hell want to find and control her.