Go Hae-jun, who ran away from home, and Baek Eun-young, a troublemaker who lives in a tent without a home. The two people who met through bad luck end up living together in an old, abandoned dormitory. A difficult coming-of-age story of two people who dislike both the dormitory and each other but have nowhere else to go.

In the not-too-distant future, the human world has long been overpopulated. Humanity marched to the stars in search of a new home, and just as this was going on, the moon's alignment caused massive earthquakes to ripple across the world, lasting several decades. Humanity was demolished. When the land finally recovered, humanity reemerged to face this strange yet familiar world. Will we, who once lorded over this domain, still remain the masters of this world?

Fan Lingxiao, a gifted spirit pet master, was ambushed in the A-level sect promotion competition and devoured by his own spirit pet whale, Kun. When he woke up, he found himself reincarnated into a young man named "Liu Fengmang" who is imprisoned in the White Mansion. His sect, Lingxiao Pavilion, was also in dire straits. In order to find out the truth about the backlash of the spirit Kun and revive his sect, Fan Lingxiao takes his existing spirit pets and embarks on a new adventure with Gu Ling, Cheng Xi, and Yue Tong.