When Felice learns that she’s the daughter of La Llorona, she catches a ride to the magical town of Tres Leches, where her mother is said to be haunting the river. Growing up with her uncle Clem in Corpus Christi, Felice knew that she had been rescued from drowning—it’s where her intense fear of water comes from—but she had no idea her mother remained trapped between worlds, looking for her. Guided by the magical town’s eccentric mayor, Felice vows to help her mother make peace with the events that turned her into the most famous monstruo of US–Mexico border lore. Along the way, she meets the children of other monstruos, like La Lechuza and the Dancing Devil, and together they free Tres Leches from magical and metaphorical curses that have haunted its people for generations.