MBC’s Friday-Saturday drama ″Married Woman Killer″ maintained its position as the top Friday-Saturday drama in the 7th episode aired on the 21st, recording viewership ratings of 9.8% (metropolitan area) and 9.7% (nationwide). The scene where Yoo Bo-na (played by Gong Hyo-jin) lies on the sofa at the mountain lodge recorded a peak rating of 12.2%, and the 2054 demographic rating was 3.7%, ranking first among all programs.

In this episode, the connection between Yoo Bo-na and Kwon Tae-sung (played by Jung Joon-won) from eight years ago was revealed in earnest. On the day of the World Cup eight years ago, Kwon Tae-sung, then a reporter, was at the plaza covering a pickpocket incident, while Yoo Bo-na, dressed as a Red Devil, was on a mission to target a drunk driving hit-and-run suspect. After the shooting, Yoo Bo-na found Kwon Tae-sung bleeding and collapsed on the emergency stairs, called for help, left the words ″Try to live if you can,″ and left the scene.

Kwon Tae-sung regained consciousness after about four months and found Yoo Bo-na standing on the railing of the hospital rooftop, grabbing her. He sincerely told Yoo Bo-na not to give up on life. Later, through articles and blogs, Yoo Bo-na learned that Kwon Tae-sung was the reporter exclusively covering Kingfisher, the group she was active in.

At the present time, controversy surrounding Kingfisher’s ″One Shot to Kill″ case has spread. Since Cheon Seong-gil’s (played by Kim Jong-gu) criminal acts were not revealed, suspicions arose that Kingfisher targeted innocent people. However, Kwon Tae-sung, along with Gu Na (played by Han Chae-rin), secured a whistleblower and uncovered Cheon Seong-gil’s crimes and contract murder circumstances, turning public opinion around.

Oh Hyun-nam (played by Ha Yul-ri) and Bong Tae-min (played by Kim Nam-hee) received a new request and carried out an operation targeting a person who committed arson murder aiming for their parents’ inheritance. Bong Tae-min used a large Paris drone to inject poison into the target’s drink, and after the operation’s success, a subtle atmosphere formed between Oh Hyun-nam and Bong Tae-min.

Kwon Se-a (played by Lee Eun-saem) developed feelings for Ki Young-do (played by Moo Jin-sung) and visited Yoo Bo-na’s house with Sales Team 3. The team prepared for a housewarming party, and Yoo Bo-na personally prepared food to welcome them. After the housewarming ended, Lee Dong-jin (played by Lee Sang-i) appeared, handing over the poison ″Mist S″ that Oh Hyun-nam had dropped, heightening tension.

Lee Dong-jin expressed gratitude for the side dishes he received from Yoo Bo-na and asked Kwon Tae-sung to take good care of her. Unaware that Yoo Bo-na was Kingfisher, he showed special feelings toward her.

At the end of the broadcast, Kwon Tae-sung said, ″You shouldn’t have come back. You shouldn’t have come this time,″ and Yoo Bo-na left a narration saying, ″It was Kwon Tae-sung who made me return as Kingfisher.″ The episode ended with a scene of the two reuniting at the mountain lodge during Kingfisher’s first hiatus.