Participants are provided with a “Mystery Rally Riddle-solving Book,” which begins with a novel-style prologue and features episodes associated with seven museums: the National Museum of Western Art, the Tokyo Metropolitan Art Museum, the National Art Center, Tokyo, the Tokyo Metropolitan Teien Art Museum, the Tokyo Photographic Art Museum, the National Museum of Modern Art, Tokyo, and the Tokyo Metropolitan Edo-Tokyo Museum. The story, in which the protagonist, a young man, visits the museums and appreciates the works of art, also incorporates details of the history of the museums and the background of their exhibits.
Participants in the tour visit the museums and subway stations as a protagonist of the story, and solve riddles hidden in the works of art exhibited in the museums and the public art at the stations. The story in the book contains clues for solving the riddles, and the readers can browse useful tips via the featured QR codes.
After cracking the seven riddles, the participants gain access to a specially-launched website to take up the challenge of solving a final mystery. A correct solution will give them the oportunity to read the epilogue of the story and the chance to win a prize in a lottery.