Summer people

Seventeen-year-old Christmas Miller's summer vacation in Sweet Lake, New York with her best friend Lexi takes a turn for the worse, when the pair have a disagreement and they find a friend, Lemy, face down in the lake. Christmas, who has ADHD, is determined to find out what happened to her friend, discover if it has anything to do with the lake's growing algae problem, and repair her friendship before summer's end.