When Anne Barker’s nine-year-old daughter Madrigal reappears after going missing for three years, everyone in her Irish-Australian town of Finnegan’s Field believe it’s a miracle. After all, the town has a history of missing children. But Annie can’t shake the notion that something is wrong with Maddie; she appears to have a second shadow, sleepwalks randomly, and her hair won’t wash. Her husband Brian and older son Jason think she’s crazy, but one night she wakes up to find Maddie gone again and the front door open. Panicked, Anne rushes out and sees her daughter walking down the street. She follows her to a park, where she climbs onto a sleeping drifter and eats him alive. Anne rushes home, vomiting, and plans to confront the creature inhabiting her daughter.  The next night, Anne puts sleeping pills in her family’s drinks and takes Maddie to a soundproof room so she can interrogate the creature inside her. She tortures it by pulling out its toenails, and learns that it is a faerie that took over her daughter’s body and only returned because Maddie wants vengeance against the person who stole her and gave her to the fae. There is no saving what remains of Maddie, but her anger tortures the faerie. Anne and the fae agree to hunt down the man who took her daughter so that she can rest, and the next day Anne goes around town collecting the smells of various suspects. She meets with the county sheriff, an old flame named Jasper who actually fathered Anne's son Jason, but he has no information for her. She returns to her house and asks her neighbor Mrs. Flynn, whose child also went missing years prior, if she has any additional suspects. Before she can learn any new information, Maddie emerges from the house and bites her with her faerie teeth, causing her to pass out.  When they’re at the hospital, the faerie apologizes to Anne for losing control because Maddie smelled the kidnapper on her and mistook them for the same person. That night, the two dress in black and drive out of the town, following the trail of the kidnapper. They get to a mound in a field and find Jasper there, digging a hole. Madrigal eats him, and finally the child is at peace with her revenge. Anne then kills her with the shovel and Mrs. Flynn appears to help her bury the body, revealing she knew the faerie lore and followed them to help. The two go home and Anne goes to bed with her husband, preparing for the inevitable mess of her future when her husband discovers Maddie is missing again tomorrow.