Jeonghye, who has been working on having a baby, notices that her husband is cheating and has a baby out of wedlock. Jeonghye talks about revenge with Mi-suk after she acknowledges Mi-suk's husbands' domestic abuse.

After forming Avengers Social Club, three women are slowly knowing each other. Then, for Dohee's son who is suffering from his school life, three women get successful to clear out the grumpy parents of a student that beated Dohee's son.

After a long debate, Avengers Social Club denies Su-gyeom's suggestion. After that, three women and Su-gyeom meets together accidentally and Su-gyeom re-asks them to help his revenge. Whereas the club members prepare for another revenge.

Dohee gets disappointed to Mi-suk since her daughter is a friend of Dohee's son's bully. Due to this problem, the club is under the danger of dismantle; however, Jeonghye an Su-gyeom try to recover the relationship between Dohee and Mi-suk.

Avengers Social Club cannot figure out the one who send the photo to Su-gyeom. Still, the club celebrates their minor revenge. After celebration, Su-gyeom who visits a hospital for an annual checkup figures out the one that sent the photo.

Youngpyo gets shamed by her daughter when he gets out for his election campaign. Su-gyeom suffers from his parents' greed. For the bigger revenge, Avengers Social Club invites Youngpyo and the principle to Jeonghye's home.