Ben, Dylan, and Gerry are still mourning their mother's death when their dad decides to buy a boat and take them on a year-long sailing trip. Tensions flare between Ben and his father, but they gradually learn to live together in close quarters. Then one morning the boys wake up to discover their father has disappeared - and they are lost. What happened to him? Where are they? And what will they do when a terrible storm looms on the horizon?