In a world where the past does not exist in a city that oppresses its subject who completely block out the past…the only hope is to unleash the Ancient book! The ruler of the city Heras controls the mind of the people and make sure that nothing in the past brought up. Though there are people who still think of the past and wish for the past to be the future instead. One day, Ardanah one of trusted Subterranean official caught herself into 2 world; to serve Heras or to unleash the Ancient book!