It was supposed to be unsinkable ... George Calder must be the luckiest kid alive-he and his little sister, Phoebe, are sailing with their aunt on the Titanic, the greatest ship ever built! George can't resist exploring every inch of the incredible boat, even if it gets him into trouble. But one night while George is off exploring, a terrible boom shakes the entire ship. Soon the impossible is happening: The Titanic is sinking. George is alone and afraid, but he's always gotten out of trouble before. Can he survive this nightmare?