It was meant to be a chance to escape the hustle and bustle of Tōkyō. Nicola was working hard as an English teacher in Japan; she desperately needed a holiday. A long weekend with her boyfriend, Akira, and two other friends, Mai and Masashi, seemed ideal. The four of them would travel by Japan's safest form of transport, the shinkansen ('bullet train'), before boarding a ferry for the trip across to the quiet island of Sado. However, Nicola...