Cal, Winter, Ryan and Boges have had enough adventures for a lifetime. But even through all their enemies are locked up or have disappeared, Winter can't shake the feeling she is being watched. When she finds a note saying "The Drowner... 30 days", her worst fears are realized. Who could be after her and her friends this time? With Cal away at flight school and a dangerous mystery to solve, will Winter be able to survive the 30-day countdown? Or will The Drowner live up to its name? The clock is ticking. Any second could be her last.