Female SWAT sniper Song Nian and her teammates fought fiercely with the robbers of the diamond escort vehicle. The captain of the SWAT team, Han Songlei, was seriously injured while protecting his teammates. Song Nian turned her grief into strength and then fought bravely with the robbers' gunman Su Xue and profiteer Zhang Maolun, finally uncovering the conspiracy behind the diamond robbery and bringing the robbers to justice.