Yun Heng, an idle warrior who calls himself a "ruin security guard," has his biggest dream to let the ancient ruins sleep peacefully - preferably without anyone disturbing him. Unfortunately, fate likes to make noise, and a large number of "artifact hunters" suddenly appeared in the ruins: Internet celebrities who wanted to shoot short videos, bodybuilding coaches who mistakenly mistook the altar for fitness equipment, and archaeological robots with built-in GPS. Yun Heng's daily life has changed from cleaning the dust of the temple to trying to persuade visitors to go away. Even cats can be fooled by him into guarding the door. While using dry humor and clever little strategies to keep the ruins away from "human activity", he slowly discovered that these strange intruders seemed to have their own little secrets - and the ruins themselves were not as well-behaved as he thought. The core conflict is between protection and openness. Yunheng needs to find a balance between "world heritage" and "private space". The highlights of the story are the imaginative interactions of the strange visitors, the mysterious "self-awareness" of the ruins, and Yun Heng's series of ridiculous guardian tricks. Who says guardianship can only be rigid and serious? Yunheng used a broom and a lazy heart to preserve history and happiness.