Just a few weeks ago, Wylie Dalton was living on a magical island where nobody ages past seventeen, and in love with Phinn, the island's leader. Now, her home is a creaky old boat where she's joined a ragtag group of cast-offs from the island, all dead-set on getting revenge on Phinn for betraying them. But when the Lost Kids invade Minor Island, they're shocked to find it totally deserted, except for one survivor who reveals the shocking news: adults have discovered the island.