Koul is a criminal from a post-apocalyptic future. He was sentenced for insolent behavior and disobedience to the authorities. In 2015, a certain virus wiped out almost the entire human population, and those who survived hid underground. At that time, scientists had already invented time-travel technology, and Koul became the guinea pig for testing this technology. He must travel back in time to prevent the pandemic, and for this he will receive full forgiveness for all he has done.