Shin Cha-il is the new head auditor of JU Construction. His sharp eyes and sharper tongue prompt a re-investigation into a tower crane accident.

Cha-il butts heads with the vice president, Dae-woong. After failing to recover evidence, he probes the tower crane operator in search of the truth.

Cha-il investigates the embezzlement case involving Mi-kyung, who he knew from college. However, when he thinks he's cracked the case, Dae-woong stands in his way.

Dae-woong puts Cha-il in a difficult position with his position at stake, and the audit team locate the embezzled money and head to the location.

Chail faces threats over meal corruption as food sabotage hits a site.

Chail captures the terrorist, but Yoon-woo stages a suicide attempt!