A high-speed shinkansen train departs from Tokyo to Morioka. At first glance, all its passengers are quite ordinary people going about their usual business. But someone was not here by chance… Satoshi seems to be a harmless schoolboy, and at the same time a 100% psychopath. Smart, cunning and very dangerous; Kimura is a former killer, and now a simple hard worker and an alcoholic in the tie; Mandarin and Lemon are two extra-class mercenaries; Suzuki is a good-natured school teacher; Nanao is "the unluckiest killer in the world", so called because his whole life is an eternal series of troubles; The boy is the son of a major mafia boss; And someone else, with his special task… These people in general are not related to each other in any way, and they were brought here by different circumstances. But just one accident — and the lines of their lives will be woven into a tight tangle. Not all of them will reach their stop. Because it is very difficult to get off the train of murderers alive…