For Allison Brice and her two younger sisters, summer has always meant water battles, trampoline games, and sharing secrets in the treehouse with their summer friends, Audrey and Carter. But this year, something is different. After Allison discovers a secret in her grandparent's attic, she is torn between her old friends and uncovering a new mystery that could change their summer traditions forever.
For Allison Brice and her two younger sisters, summer has always meant water battles, trampoline games, and sharing secrets in the treehouse with thei...
