Kawamura Yasuhiro, an official of the Japanese Ministry of Construction, was believed to have collected a large amount of secrets from the United States during his tenure. In order to prevent the United States from causing harm to the country, the United States sent CIA officials to follow Kawamura, ready to take back the USB flash drive that was said to contain secrets. At the beginning of the operation, the CIA discovered that the killer John Rain (played by Kippei Shiina) was also involved. John is a mixed-race American and Japanese. After the Vietnam War, he was trained to become a lone killer. His footprints spread all over the world and became a headache for the US government. When Kawamura stepped into the subway, he suddenly died of a heart attack, and the whereabouts of the USB flash drive were unknown. After that, the CIA, the Japanese police, and the Japanese gangs took action one after another. They all set their sights on Kawamura's daughter A-Lu (played by Kyoko Hasegawa) and John... This film is based on the debut work of Barry Eisler, a famous American thriller novelist, and the first part of the "Assassin John Rain series".