From the author of Strange Pictures and a bestselling mystery-horror phenomenon in Japan - mysterious spaces, trap doors, windowless children's rooms . . . something is wrong with this house. Can you solve the "mystery" of its floor plan? A writer fascinated by the macabre stumbles upon a decades-long conspiracy when he is approached by an acquaintance who is unsettled by a house in Tokyo. With its bright and spacious interior, it seems like the perfect first home. But upon closer inspection, the building's floor plan reveals a mysterious "dead space" hidden between the walls. Seeking a second opinion, the writer shares the floor plan with his friend Kurihara, an architect, only to discover more strange spaces hidden throughout. When a dead body is discovered near the house, the mystery deepens. What are these mysterious "dead spaces," and why do they exist - are they really there, or is there something off with the floor plan? And who is the home's former resident that suddenly disappeared? Like the wildly inventive Strange Pictures before it, Uketsu casts readers in the role of detective, inviting them to piece together the truth between these puzzling floor plans . . . and the terrifying plot behind it all. Translated from the Japanese by Jim Rion