An original episode set within the Silent Möbius universe. Above Tokyo, a ship has appeared in the clouds — one that, on closer inspection, matches the RMS Titanic in every visible detail. The Titanic sank in the Atlantic in 1912. Its presence at altitude over the city cannot be explained by any conventional framework. The unnamed male protagonist boards the vessel alongside Rally, Kiddy, Nami, and other heroines from the manga to investigate what a ship that should not exist is doing in the sky above Tokyo.