The previous episode left off with Yoo-ra and Jung-wook announcing their intention to get married, and Perfect Marriage Revenge Episode 7 continues with their announcement. It has left the whole family dumbfounded. In addition, Jung-wook and Do-guk have an altercation because Do-guk is tired of Jung-wook acting like a victim. Following this, Tae-ja orders Jung-wook to drop Yoo-ra back at her house.
Yoo-ra feels bitter about the fact that Jung-wook couldn’t get his family to accept her. When she expresses her worries to him, he dismisses them as her problem, not his. This upsets Yoo-ra even further.
In order to uncover the truth about Do-guk and her sister, Yoo-ra meets up with Se-hyeok later that night. After Se-hyeok stubbornly refuses to spill the tea, she leaves feeling defeated.
When Yi-joo and Do-guk aren’t home the next day, Se-hyeok breaks in. He then ends up finding Yi-joo and Do-guk’s marriage contract, and he takes it with him.
Se-hyeok approaches Yi-joo and attempts to strike up a conversation. Nonetheless, Do-guk interrupts Se-hyeok and asks him to stop bothering his wife. It upsets Se-hyeok when Do-guk gets all romantic and leaves with Yi-joo.
At this point, Jung-hye finds out that Woon-jae, her father-in-law, has managed to get out of the hospital room. On top of that, she is absolutely distraught when she finds out that her father-in-law has joined forces with Yi-joo. Shortly after, she also learns that Yi-joo knows that she’s Jin-woong’s biological daughter.
When Yi-joo and Do-guk reach Do-guk’s family home, they find everyone present, including Yoo-ra. Following this, they learn that Yoo-ra has told everyone about the marriage contract, and the entire family is left confused and upset. To make matters worse, Tae-ja passes out just as the situation is heating up.
At the cooking class, one of the participants attempts to get on Yeon-hwa’s nerves. This is where Yi-joo intervenes and defends her mother-in-law. Following that, Yeon-hwa brings up the subject of the marriage contract with Yi-joo. While this is happening, Do-guk joins the duo, and he practically begs his mother to help him and his wife out. He continues by detailing the many ways in which Yi-joo’s family has treated her badly.
By going to see Jung-hye, Yeon-hwa takes matters into her own hands. As she arrives, her suspicions are confirmed about Jung-hye’s jealousy and malice towards her adoptive daughter, Yi-joo. Following that, she tells Jung-hye that they aren’t going to let Jung-wook marry Yoo-ra. The episode comes to a close, with Yeon-hwa challenging Jung-hye.
In episode 7, the Hanwool family learns about Yi-joo and Do-guk’s marriage contract. In order to get to know Jung-hye, Yeon-hwa decides to meet her privately. Jae-won continues to help Yi-joo.
With some engaging drama, the episode is captivating and enjoyable. That being said, this episode somewhat failed to live up to the expectations it set earlier rather than exceeding them.