Dong Joo's journey to reveal the secrets behind his father's death continues. Tae Joon leads the NTS full of ambition. Dong Joo finds out that Tae Joon is related to his father's death and looks for additional evidence. Along with unlocking the secrets behind Dong Joo's father's death, Bureau Five continues to punish the tax evasion, secret funds, and corrupt trading of top officials in the country. Will Dong Joo and his teammates complete their journey in success?