Sixteen-year-old Lucy's life-saving heart transplant comes with a terrifying side effect: cellular memory in the form of nightmares. Lucy dreams about feet pounding the pavement, fingers locked around a fragile neck, and shortness of breath. Mounting sleepless nights threaten to weaken her new heart.

When she crashes her bike beneath a highway underpass, she’s rescued by JR, a surfer dude who takes easy-on-the-eye to a new level and draws portraits as easily as drawing breath. With JR’s guidance, Lucy confronts her nightmares by sketching detailed images she sees each night, until a familiar face appears—one she’s sure has an insidious link to the heart beating in her chest.