Production(s): As One Production ,
The film is adapted from a novel of the same name created by the Mai family. In the 1940s, the world situation was turbulent, and it was crucial to immediately and accurately decipher enemy communication passwords. Rong Jinzhen (played by Liu Haoran) has shown a unique talent for numbers since childhood. Due to accidentally solving a difficult problem set by a math teacher, he has been noticed by more people.