Three years ago, Mu Chen, one of the members of the famous boy band, died. The strict and civilized City A Police Station closed the case at the speed of light in 72 hours. Mu Chen's only sister Mu He couldn't accept it and committed suicide by jumping off a building abroad.
Three years later, group member Huang Zijie was brutally murdered.
The matter was so important that the Central Police Academy dispatched Gu Ci and Fei Qing to City A to assist in the investigation.
The deeper the investigation, the more confusing the clues become, all pointing to the Mu Chen case that was hastily sealed back then.
"It's her... It's her! She didn't die at all back then!"
Who is "she"? Why kill the remaining people...
Purpose: revenge