"Brooklyn girl Kaylani McKinnon feels like a fish out of water. She's spending the summer with family friends in their huge house on Martha's Vineyard, and the vibe is definitely snooty. Still, there are beautiful beaches, lots of ice cream, and a town full of fascinating Black history. Plus a few kids her age who seem friendly. Until the shocking death of a teenage boy. Was it a drowning? A shark attack? Or the unthinkable -- murder? Kaylani is determined to solve the mystery. But her investigation uncovers shattering secrets that could change her own life as she knows it... if she survives. -- Provided by publisher.