Sixteen-year-old Luella lives on an island with only her cruel father for company. Every twenty-fifth ship that passes, he shuts off the lighthouse, leaving Luella to guiltily dive for supplies in the resulting wreckage.
She's given up hope of rescue--until she spots a newspaper ad for The Society for the Protection of Faeries. She writes in, claiming selkies live on the island to entice the group to come...and they do. Led by dreamy trans boy Enoch, the Society invites her to join them in gathering evidence of faerie activity. Luella fakes faerie magic to provide proof of her claims, desperate to keep these new friends...only to realize one of them is an imposter who actually possesses magic. Protective of the Society but anxious about her own lies, Luella must face the falsehoods that haunt her to uncover the truth.