Synopsis

The field trip concluded, but the return journey to Tokyo had become a deadly trap. A bomb had been planted within the bullet train carrying Kinji and his companions. Its detonation was triggered not by time, but by speed: a deceleration would set it off, and the train's velocity had to increase by ten kilometers per hour every three minutes to avert disaster. Adding to the peril, Riko had determined that the perpetrator was among them, a chilling realization within the confines of the speeding