Kimura’s young son is in a coma thanks to the Prince, and Kimura has tracked him onto a bullet train heading from Tokyo to Morioka to exact his revenge. But Kimura soon discovers that they are not the only dangerous passengers on board. Satoshi—the Prince—looks like an innocent schoolboy but is really a stylish and devious assassin. Risk fuels him, as does a good philosophical debate, such as questioning: Is killing really wrong? Nanao, nicknamed Ladybug, the self-proclaimed “unluckiest assassin in the world,” is put on the bullet train by his boss, a mysterious young woman called Maria, to steal a suitcase full of money and get off at the first stop. The lethal duo of Tangerine and Lemon are also traveling to Morioka, and the suitcase leads others to show their hands. Why are they all on the same train, and who will make it off alive?

Kimura’s young son is in a coma thanks to the Prince, and Kimura has tracked him onto a bullet train heading from Tokyo to Morioka to exact his revenge. But Kimura soon discovers that they are not the only dangerous passengers on board. Satoshi—the Prince—looks like an innocent schoolboy but is really a stylish and devious assassin. Risk fuels him, as does a good philosophical debate, such as questioning: Is killing really wrong? Nanao, nicknamed Ladybug, the self-proclaimed “unluckiest assassin in the world,” is put on the bullet train by his boss, a mysterious young woman called Maria, to steal a suitcase full of money and get off at the first stop. The lethal duo of Tangerine and Lemon are also traveling to Morioka, and the suitcase leads others to show their hands. Why are they all on the same train, and who will make it off alive?