A strange man suddenly appears in the midst of people’s everyday lives, and those innocently connected to him begin turning up dead. Changing his outward appearance—from sailor to cram school instructor, cleaner, truck driver. He is a complete stranger, yet someone who could easily exist in our everyday life, surfacing in city after city. However, there is no clear motive, no convincing clue. These deaths are not incidents that can be tracked or foreseen, but disasters one must helplessly confront. SAI: disaster depicts an enervated, gloomy urban landscape infected by fragments of death and the appearance of a man who moves among them. The merciless chain of deaths, with no discernible beginning or end, infiltrates people’s lives as an empty yet inescapable form of tragedy.