When Liv and Nora decide to take their husbands and children on a holiday cruise, everyone is thrilled. The adults are lulled by the ship's comfort and ease. The four children--ages six to eleven--love the nonstop buffet and their newfound independence. But when they all go ashore for an adventure in Central America, a series of minor misfortunes and miscalculations leads the families farther from the safety of the ship. One minute the children are there, and the next they're gone.