Harriet Flores struggles with boredom and an unrequited crush while learning to manage her chronic illness through a long, hot, 1990s summer in Chicago. She uses her imagination to cope, which sometimes gets her into trouble, as she makes up fantastical fibs and wonders if there are ghosts upstairs. One neighbor, Pearl, encourages Harriet to read and write, leading Harriet to have a breakthrough and discover the power of storytelling.