Five years after almost drowning, Olivia Cathart returns home to Caldwell Beach determined to face her fears and take some risks—not just by swimming but by opening her heart. Hoping to rekindle her friendships, she’s excited about a carefree summer with her best friends Keely and Miles. But life in the sleepy town has changed, and no one and nothing is as it seems.

When a series of startling crimes threaten Olivia’s fragile state, she is plunged into a terrifying game of cat and mouse. Her only solace from the chaos is West, Miles’s disowned and ruggedly handsome brother, but even he can’t answer the question on everyone’s minds:

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Is Olivia really in danger or is it simply all in her head?