In the 1830s, Shanghai was in the isolation period. In the Grand Guangming Cinema, the largest cinema in the Far East: a down-and-out male protagonist who has no memory of his identity, and a novice female protagonist who has just entered the military command, pretend to be the soundtrack engineer and projectionist of the cinema respectively, and jointly carry out an impossible task: to find the three underground gangs who have lost contact in the cinema, and at the same time to screen the three fake underground gangs planted by the Japanese spy agency.
In a play within a play, Mission: Impossible, a male violinist and a female ordnance expert composed a hymn of loyalty with their flesh and blood for the bright future of the motherland.
