Since his release from prison, Sweet Potato has been content to run a little business with a meager income by the sea, disregarding the advice of others to the contrary.

Fourteen-year-old Li Xing lives in a district full of ruins and reconstruction. School brings him nothing but problems and his family is no help at all. One day, he finds an underground shelter where strange things happen...

In a remote village in Xinjiang, a young Kazakh boy named Arsin, who finds solace in the company of plants. He soon meets Meiyu, a spirited Han girl whose unpredictable nature reminds him of a rare, otherworldly plant. As their friendship blossoms, it deepens into a delicate, dreamlike allegory that blurs the lines between reality and the enchanting world of botany.