Toni and the young crew of the sailboat, Whistler, have just found a safe harbor. Or so they thought...

They may have survived a tsunami, but they're racing ahead of an ice age as they continue the frantic search for their families.

The island they've anchored near is anything but safe. Dangerous men lurk nearby—along with snakes, stingrays, and sharks. An island girl threatens to destroy Toni and her boyfriend's relationship, the youngest member of the crew gets lost in a narrow dark cave, and Zoë is more annoying than ever.

Will Toni and her crew survive the island and its treacherous waters?