A stolen weapon of mass destruction hidden years ago on board the Queen Mary, has remained there unknown and undisturbed. That is, up to now. Agents Falk and Koski are called in to evacuate the ship and somehow locate the bomb. Running out of time, they risk their lives to locate the weapon, not knowing that a Girl Scout strayed from her group during evacuation and is hiding in the ship's Trafalgar Square gift shop. The fourth in the Koski and Falk series.