Twelve-year-olds Madeleine, Theo, and Lulu, and thirteen-year-old Garrison, are sent to a remote Massachusetts school to overcome their phobias, but tragedy strikes and the quartet must work together--with no adult assistance--to face their fears.

"Celeste knows she should be excited to spend two weeks at her grandparents' lake house with her brother, Owen, and their cousins Capri and Daisy, but she's not. Bugs, bad cell reception, and the dark waters of the lake... no thanks. On top of that, she just failed her swim test and hates being in the water-it's terrifying. But her grandparents are strong believers in their family knowing how to swim, especially having grown up during a time of segregation...