High school student Lu Jing is seen by everyone around him as a delusional teenager who spends his days imagining himself as a Night Watchman. Unexpectedly, he awakens a special power that allows his fantasies to distort reality. His half-sister, Lu Xue, is an S-rank, second-tier magic mage trapped in an endlessly resetting time loop. She has come to monitor him as part of an organization's mission. As interdimensional dungeons, including the Nine-Story Demon Tower, begin opening one after another, psychics of all kinds emerge. Lu Jing conceals his true strength, pretending to be weak while secretly outsmarting his enemies. Amid their fateful time loop, the surveillance mission, and one crisis after another, the siblings struggle to navigate their complicated situation as a vast game of fate slowly unfolds around them.