I feel as if I should always note when a book is YA. This book is YA.
There is a girl trying to fit in with a group of classmates who don't really seem interested in increasing their numbers. She does stuff, like allow one of the group members to cut her hair, so they'll like her. With every hoop she is asked to jump through there is the inevitable unintended consequence. Things get infinitely worse when she is challenged to jump on top of boarded up well, and she falls in.
While stuck in the well, Kammie begins to examine the events in her life that brought her to this place. She recognizes that the bullies she wanted as friends might not be worth it. And then she starts to lose air and her predicament becomes dangerous.
61 done and still reading!