Three can keep a secret, but only if two are dead.

No one knows that better than Kaitlyn Ashe, who has been running from a childhood secret her whole life. Until now. Crowned the top rated radio DJ in Philadelphia, she is finally ready to settle down with her fianc who knows nothing about her past. When a sudden flood of anonymous letters threatens Kaitlyn's seemingly charmed life, she realizes that someone out there knows her secret. But who?

As the threatening letters escalate, Kaitlyn's life spirals toward a reunion in the one place she'd hoped to never visit again: The Shallows. Isn't her secret buried with the dead?