Young Ye Xun inherited his master's legacy and became the last mountain and sea patrol envoy. He walks between the human world and the ancient mountains and seas, guiding the lost beasts to return and suppressing the evil beasts causing chaos.
Accompanied by the grass elf Qingyao, the two uncover a shocking secret in the dense forest and mountains: the world of mountains and seas is collapsing, and the mission of the forest ranger is far more than just protection. When the mastermind behind the scenes surfaced, Ye Xun realized that there was another hidden reason behind his master's death.
He has to face not only ferocious beasts, but also the greed of people.
