One of Canada's top scientists has found the secret to time travel. But something has gone horribly wrong.... again. While breaking into his old house, thirteen-year-old Matt Barnes finds a microfilm that connects his family to a spy in World War II. Then his time-traveling father is yanked to the same time period, in occupied Amsterdam. The only way Matt can rescue his father is to travel to this time, and the only person who can help him is his best friend, Sarah Sachs. When Matt and Sarah land in the war-torn country, they're immediately caught up in a world of high intrigue and dangerous covert operations. They encounter courageous pilots, determined spies, gallant members of the Dutch resistance, and ordinary heroes. Matt and Sarah receive the surprise of their lives when they meet the legendary Anne Frank. Can they help these people destined for a terrible fate? Should they interfere in history once again? But, ultimately, Matt will be forced to make a choice that might save his father but lead to a sacrifice greater than anything he'd ever dreamed of. Will he be able to live with his decision, even though it will rip his heart in two?