On December 6, 1917, the French munitions ship Mont Blanc collided with the Belgian relief vessel Imo in the Halifax Harbour. The sparks from the collision caused the Mont Blanc's explosive cargo to blow up, flattening homes and businesses and triggering a tsunami. Amid the devastation that followed was fourteen-year-old Barbara Orr, who had been walking to a friend's house. Follow Barbara as she navigates postexplosion Halifax, learning about rescue efforts, the kindness of strangers and the bravery of everyday people. Includes highlighted glossary terms, educational sidebars, over fifty illustrations and historical photographs, a detailed index and recommended further reading.