Gu Qingyu, a modern young man, travels through time and becomes a low-level policeman in a world where monsters are rampant. At the critical moment of life and death, he activates the god-level monster-catching system. Killing monsters can improve his cultivation level. He relied on the system and Qing Yuan Jia to repeatedly solve strange cases and kill all kinds of evil spirits, all the way from the first level of body refining to the Qi refining realm. On the way, he accidentally awakened Xuanwu's clone, and his strength skyrocketed. He was also exceptionally included in the Demon Suppression Division. From a despised little catcher, he counterattacked and became a top expert who slayed demons and protected one side, starting a legend of controlling beasts and cultivating immortals.
