One is a bum, one gets by selling self-help DVDs: Mei Yuan Gui is a guy who survives by leeching off his girlfriends; Ye Xiao Chun is a girl who sells DVDs for a living. Two people in the bottom rungs of society meet by accident one day when the guy saves the girl, and so begins the most hilarious, silly and touching love story.

Focuses on the people, their stories and architecture spanning from the mid-1800s, when Shanghai was opened as a trading port, to the present day.

Beijing, the present day. Popular TV personality Da Peng is invited by gangster businessman Wang Hai to make a film in which he will invest. Wang insists that Da Peng's co-star is TV drama actress Du Xiaoxiao. However, after a nightclub scandal involving Da Peng goes viral, he's blackballed by a powerful internet executive and finds himself unable to attract any male co-star. Wang also wants his investment back. Da Peng decides to make his own movie on the cheap, using a script he has about an alien, A Li, who arrives on Earth and has various adventures as a superhero.