Inspired by the mysterious legend of Suolong Mountain, it tells the story of photographer Zhao Ye and temple keeper Lin Mo who are involved in the protection and struggle for the energy of the Dragon Cave due to an accident.
Deep in the dragon cave lies an ancient power called "source", which is both a symbol of vitality and a hidden risk of losing control. Decades ago, an experiment surrounding the "source" left behind a heavy past, involving the bonds of several generations: the dust-covered diary, the broken plum blossom hairpin, and the rouge marks on the copper bell, all tell the emotions and regrets of the mission.
When the mysterious organization tries to use the power of "Source" to break the balance, Zhao Ye and Lin Mo embark on the road of protection. They followed the pulse of the earth's veins to unravel the mystery of the three caves in a row. Under the guidance of the stars and blood, they understood the true meaning of "keeping the center and achieving peace" amidst dangers. In the end, the secrets of Long Cave returned to the dust, and only the fragrance of plum blossoms in the mountains, the lingering charm of copper bells, and people's relief from the past and determination for the future flow quietly in the four seasons of Suolong Mountain.
