Do Hyun Woo (Lee Sun Kyun) is a television producer who has been married to his wife, Jung Soo Yeon (Song Ji Hyo), for seven years. Despite believing that his marriage was impenetrable, he discovers that his wife may be on the verge of having an affair.
At first, he turns to his friends, Lawyer Choi Yoon Gi (Kim Hee Won) and Ahn Joon Young (Lee Sang Yeob) for advice as they are both married. However, Yoon Gi is a serial cheater and savvy at finding ways from his wife, Eun Ah Ra (Ye Ji Won), from finding out. Joon Young is also unhelpful as he always believed that Soo Yeon and Hyun were the picture perfect couple and the news of the infidelity takes an emotional toll on him. And yet, Joon Young’s own life is full of mystery as he uses work as an excuse to get closer to a fellow colleague at work, the production crew’s main writer and divorcee, Kwon Bo Young (BoA).
To make matters worse, Do Hyun’s company is interested in making a new program all about wives who cheat on their husbands. At a loss about what to do, he turns to people on the internet for their perspective on the matter.