The Code at Dawn: A Signal Officer’s Mission

Mathematical prodigy Lin Mo is recruited as a cipher clerk for the military intelligence service, tasked with cracking Japanese codes. At work, she discovers that the Japanese are planning to sabotage Chongqing’s arsenal, but a mole within the intelligence service prevents the information from getting through. She meets Chen Mo, an underground Communist Party member, and the two risk everything to get around the mole and deliver the intelligence, leaving Lin Mo under suspicion from the intelligence service.