Chinese Criminal Police Officer, Captain Ji Bai travels to Myanmar to retrieve a friend, Ye Zi's, tobacco pipe heirloom thats connected to her father's murder believed to be done by her uncle. Meanwhile, 2 female recruits are welcomed to the Major Crimes Unit, the strong and confident, Yao Meng , and a socially-challenged criminal profiler named Xu Xu. Ji Bai isn't happy to have Xu Xu join because she failed the physical fitness test but was let in because of her expertise in profiling. Xu Xu proves her capabilities by creating accurate profile animal drawings of each team members. Meanwhile, Ji Bai has to deal with underground dealings of the Golden Python and someone nicknamed Cobra, and then meets up with Ye Zi when he arrives back. During Ji Bai's absence, the Crimes Unit has a case about an individual hiding blades all over the city causing citizens harm.