A secret order of women tasked with maintaining the world's goodness needs new recruits to avoid the resurgence of an ancient threat. Impulsive and fun-loving Lexi McArthur is turning 19 with no purpose in life, aside from a knack for solving other people's problems. When her own problems manifest in an unexpected, relentless form, she can't decline an offer to join the should-be mythical group of aging fairy godmothers. Between learning what they use their powers for and demonstrating her own lack of skill with that power, she wonders if the fairy godmothers picked the wrong girl, especially when compared to her fellow trainee. With nighttime visits from a guy with mysterious magic, increasingly creepy mishaps in her new home, and a less-than-benevolent fairy godmother expecting her to fail, her new reality may not be an improvement over the life she left behind. When mistakes and secrets are revealed, she needs to figure out how to harness her abilities and how to trust the right people before a long-forgotten horror is unleashed.