Contemporary, along the Yangtze River in China. Captain Gao Chun (Qin Hao) keeps going ashore to look for romantic encounters while driving a cargo ship along the Yangtze River to deliver goods. But he gradually discovered that these women he met at different docks seemed to be the same person-Anlu (Xin Zhilei). It's just that as the voyage goes upstream, Anlu is sometimes gentle, sometimes crazy, but getting younger and younger. Gao Chun is fascinated by Anlu, and keeps stopping the ship to meet her. He also gradually discovers that the places where Anlu appears are all related to a handwritten collection of poems by an unknown author. But after the ship passed the Three Gorges, Anlu no longer appeared. Gao Chun frantically searched for Anlu, and found the pattern of Anlu's appearance in the poetry collection and route map. Something happened on the ship, but he desperately drove the cargo ship alone and continued to go up the Yangtze River until the snow-capped mountains at the source, and finally discovered the origin of Anlu and the secret of the Yangtze River.