Zi Qi (played by He Junxiang), a sound engineer who has left footprints all over the world, left Hong Kong and arrived in Beijing, where he met Bai Ye (played by Li Xiaolu), a mysterious girl driving a motorhome, who invited him to get in the car. During the conversation, the two strangers found that their travel plans were surprisingly consistent, so they agreed to travel together and break up at the dam. Starting from the Great Wall, Bai Ye's excessive behavior caused Zi Qi a lot of trouble. In the verbal battles and bold jokes, this girl who admired Yu Chunshun's behavior made Zi Qi lose control again and again. Soon, Zi Qi received a call from Bai Ye's father and learned that his travel companion was terminally ill. Zi Qi helped Bai Ye find the legendary tree house for the rest of the journey, but at this time Bai Ye died mysteriously... Six months later, Zi Qi met Yan Qing, a rich second-generation writer who looked exactly like Bai Ye, and learned the truth of the matter...