1928, Peking. Su Chengran, a clerk in the archives department of the police station, accidentally received a wordless notebook, and it came true when he wrote it down. A seemingly ordinary bank murder involved him in a shocking undercurrent: a three-party struggle between the old Beiyang Department, the Japanese Super High School, and the remnants of the Revolutionary Party. Every time a hidden clue is uncovered, someone dies mysteriously. When he teamed up with reporter Chen Yaqing to investigate, he discovered that the biggest secret was hidden in his own life experience.