1x8 - Cheat On Me, If You Can

Yeo Joo starts to sense that Woo Sung is having an affair and goes to extremes to confirm it after finding a suspicious hair on his shirt. Later, Woo Sung finds himself mixed up with someone he never intended to see after taking on a new case. Meanwhile, Soo Ho asks his seniors, who had kept an eye on Yeo Joo, the reason behind it as the mystery surrounding her grows darker.