To ease the heavy burden of his grandfather carrying oranges down the mountain, Lin Gui, a young man suffering from acrophobia, decides to build a gravity-powered fruit roller coaster amidst the steep mountain woods. Facing strong skepticism from elders, crude scrap materials, and a sudden rainstorm crisis, he battles his fear and pushes forward with the construction on sheer cliffs. This track, carrying family affection and technological dreams, must withstand the ultimate test in howling winds and pouring rain to prove whether it can transport intact oranges down the mountain and ultimately change the destiny of agricultural logistics in the big mountains.