Cheat On Me, If You Can

S1, E6: Although the police have Yeo Joo as a suspect, she plays it cool and believes that they can't pin anything on her without a motive. However, little does she know, the police have Woo Sung on camera entering Baek Soo Jung's studio apartment. Later, when Woo Sung decides to tell Yeo Joo about his affair with Soo Jung, his blackmailer collapses when he realizes he doesn't have footage of Woo Sung anymore.