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Greg and his family are on a summer road trip across the country. They dream of an exciting adventure, but their plans are thwarted. At first, the Gefli family stays in a motorhome park that doesn't look like paradise. But things take a turn for the worse when the skies open up and the water level begins to rise steadily. Will the Hefleys manage to save their holiday, or will their loyalties be swallowed up in the water?