In Shanghai in 1927, Wang Chenran witnessed his family being exterminated. After he was rescued by a mysterious organization, he discovered that his enemy was actually a Chinese inspector from the concession patrol house. Three years later, he returned to Shanghai, using the codename "Shadow" to navigate between black and white. He met the singer Han Shiqing, but he did not know that her life experience was closely connected with the murder case. When revenge intertwines with the truth, he must find the real mastermind in hundreds of days and nights of secret battles.
