[Machine Translation] One day, Yoko Yamakawa, a nursery school teacher, takes a child, Toi Momoshiro, home after her guardian is late picking her up. Her home is in an unsafe downtown area, and her father, who calls himself Nichigure Tabito, runs a strange detective agency specializing in searching for things. The clear-eyed traveler and the doll-like beauty of Toi. Intrigued by the mysterious father and son with different last names, Yoko often visits the office and learns of the traveler's abilities. Sound, smell, taste, texture, temperature, weight, pain. She learns that the traveler searches for things by "seeing" invisible things.