It was supposed to be a luxury cruise: a four-day round trip from Galveston, Texas to Cozumel, Mexico. But for the 4,000+ passengers and crew on board, the reality proves catastrophically different. After an engine room fire destroys electrical cables supplying the entire ship, the boat is left drifting with no power for propulsion, refrigeration, lighting, air-conditioning, or, worst of all … flushing toilets.