What begins as a family holiday in Japan soon turns into Toby and Claire's most thrilling adventure yet. While exploring Tokyo's bustling train stations, the siblings stumble across a series of mysterious symbols-recurring images that seem far too deliberate to be coincidence.
Their curiosity leads them deep into the world of ancient samurai legends, hidden messages, and long-forgotten secrets buried beneath the surface of modern-day Japan. With the help of a new friend, Aiko, Toby and Claire must follow a centuries-old trail of clues-without alerting their parents or drawing the attention of those who would do anything to keep the past hidden.
As the danger mounts and the pieces of the puzzle begin to fall into place, the siblings find themselves racing against time to uncover the truth before it's lost forever.
History has a way of keeping its secrets... but Toby Jones is determined to reveal them.