After an adventure-filled June, all Kay Telfair wants is a quiet vacation in Maine with her family and best friend Anna—no drama, no stress. But the thirteen-year-old’s hopes for a tranquil August stay in the village of Prospect Harbor soon fade when the girls compete for the attention of a young boy and Kay makes a startling discovery—a discovery that sends the three teens on a dangerous quest. Ignoring advice—and menacing threats from others—they continue their pursuit, drawing them deeper into a perilous mystery, deeper than Kay ever could have imagined.