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.