In 1941, there was an undercurrent surging on the isolated island of Shanghai. Bank employee Shen Qinghe appears to be cautious, but in fact he is an underground intelligence agent code-named "Celadon". A top-secret codebook involving countless people's lives accidentally fell into his hands, and all forces took action. Under the shadow of neon lights and gunfire, he must use wisdom and courage to protect secrets and deliver hope in a desperate situation surrounded by enemies.
