Xiao Wen, a rookie police officer frustrated by her lack of success, helps her team solve a long-standing serial murder case after receiving an anonymous phone call. Her outstanding performance gradually arouses suspicion within the police force. To prove her innocence, Xiao Wen has no choice but to uncover the person behind the anonymous call.
As Xiao Wen digs deeper, an entertainment empire worth tens of billions of yuan comes into view. She discovers that Kevin, the entertainment group's vice president, is plotting to work with South American drug lords, and this is only the tip of the iceberg of a criminal organization operating behind the scenes.
Xiao Wen decides to take on the criminal organization to the end. To do that, she realizes she must first become a big shot herself.