A transplant patient and the doctor who refused to give up on her form a bond in the spaces between heartbeats and monitor beeps. Bound by ethical lines and unspoken restraint, their connection lingers long after she leaves the hospital. When they meet again months later, both changed by survival and loss, they discover that some people are stitched into you deeper than scars.

For Lexi Vaughn, life is good. She has her own house, a stable job, plenty of friends, and the respect of everyone on Amity (except her father, that is). But when Chrissie goes missing, she knows what the culprit is: a shark, threatening to throw off the delicate balance of Amity and destroy everything she holds dear. To save herself and her island, she will need to strengthen her current relationships, develop new ones, and mend long-broken ones.