Ma-ri starts to find evidence that Nak-gu is having an affair; she goes to a lawyer to plan the divorce; Hee-soo goes through a problem with her husband; her long and old dream of having a child becomes nothing because of what her husband has done.

Ma-ri is in search of evidence that Nak-gu was having an affair in April 2021; she digs into a speeding ticket of that day in hopes of finding a photo of both Nak-gu and Go-eun; Nak-gu goes to a divorce specialist lawyer to win against Ma-ri.

Ma-ri finds Nak-gu and Go-eun when the two are on their way to get married; the aggressive car chase ends up sending Ma-ri and Nak-gu to a hospital; Woo-bin suddenly appears in front of Jin-ah; Jin-ah impulsively takes him home and locks him up.

Ma-ri and Nak-gu face off in their legal dispute; they use every evidence they have to get the upper hand; Woo-bin stays at Jin-ah's place; one night, the two catch the Squirrel as Woo-bin clearly remembers how he looks like.