Having undergone samurai training, having fought in Japan with samurai and ninjas, Jack reached the sea and went to his native land. He has only one goal: to return to London to his sister, Jess. But, having set foot on the soil of England, Jack feels himself further from home than ever. His sister is missing, a plague has swept through the city, and a duel will soon test his samurai skills, threatening his death. A dark shadow hangs over Jack and his friends. There's not enough time, but they need to solve the mystery of Jess's disappearance before it's too late...