In the Emerald Forest, where magical creatures live, there is a legend: when the breath of the black dragon freezes the moonlight, the silver-white horn will pierce the darkness, and the ancient covenant will guide the lost back home.
Ao Chen, a young man from the Dragon Clan, is the Sheriff of the Emerald Forest. He has great martial arts but his brain is on vacation all year round. Unicorn girl Yunge, the forest librarian, is knowledgeable but has about zero physical strength. When these two incomparable race representatives are forcibly tied into a partnership by an inexplicable "race exchange and cooperation" decree, the "peaceful" days of the entire forest come to an end.
From investigating the theft of magic honey to tracking down strange rain that causes elves to dance, their daily work is to deal with these seemingly trivial "abnormal matters" that actually hide mysteries. Until one day, the spring of eternity, the source of life in the forest, began to dry up inexplicably, and all clues pointed to the legendary forbidden place...
A reckless man who just wants to solve problems with his fists, and a top student who just wants to convince each other with books are forced to form a team and embark on a journey to save the world. There was an unknown danger in the front, and they disliked each other in the end. Can they succeed? Maybe, before they can save the world, they have to learn not to piss each other off.
