A beautiful and distinguished family. A private island. A brilliant, damaged girl; a passionate, political boy. A group of friends--the Liars--whose friendship turns destructive. A revolution. an accident. A secret. Lies upon lies. True love. The truth. Spending the summers on her family's private island off the coast of Massachusetts with her cousins and a special boy named Gat, teenaged Cadence struggles to remember what happened during her fifteenth summer.