Lin Shen, a cryptographic expert from the National Security Bureau of China, encountered a laboratory accident while cracking the code left by the Japanese army. His soul traveled to Shanghai in 1937 and replaced the murdered military agent "Night Owl". Using modern cryptography knowledge to decipher the Japanese military's secret messages, he rose through the ranks at Agent 76 headquarters and became a "traitor" relied upon by the Japanese military police while secretly delivering key information.
Purpose: The test of faith and humanity