The play is based on a lost gun, which links up the monstrous secrets that have been buried in time. Young criminal policeman Wen Binbin (played by Ding Yuxi) searches for his lost gun with the help of detachment leader Xing Liang (played by Ning Li). In the fight against evil forces, he is indomitable, and he has gone through hardships and remained unswerving. Finally, he finds out the truth and captures the real culprit behind the scenes, and wipes out the evil forces.