Shen Yuansheng appears to be a gentle banker in Shanghai. Privately, he is a double agent codenamed "The Ferryman". He went around among senior Japanese and puppet officials every day, hiding top-secret information in bank slips. He thought he was perfectly hidden. Until one day, he came home late at night and opened the study door and found a bullet on his desk. Under the bullet was a note: "Dear ferryman, see you at the third pier of the Huangpu River tomorrow night at seven o'clock." The signature was actually the handwriting of his fiancée who had sacrificed for many years.