It is 1915, and twelve-year-old Penny and her brother Charles are embarking on a trip to England aboard the RMS Lusitania. But war is brewing overseas, and there are rumors that Germany will torpedo any ship that comes into the area--even a ship full of civilian passengers. Shy and nervous Penny is worried, but those worries fade when she makes her first real friend, a bold girl named Mary. With Mary, Penny begins to find her voice for the first time...