Season 1
Jung-hye has too much money on her hands. As the daughter of a very wealthy family, she leads a seemingly perfect life on the outside. Inside, however, her marriage is rather a sad story, and things only get worse when her husband brings a child from an extramaritial affair. Having enough, she sets out to find the ‘Avengers’ Social Club’ with fellow neighborhood friends who also has desires to revenge on their husbands or frenemies.
Episode 1
Jung-hye suggests Do-hee and Mi-sook, who compromise with reality, form Avengers' Social Club.
Episode 2
Do-hee solves the problem of his son's assault. Jung-hye hears a tempting offer from Soo-gyum.
Episode 3
The club refuses Soo-gyum. Soo-gyum goes to the police, and Do-hee plans revenge with the club.
Episode 4
Byung-soo secretly plans to steal the gravesite. Someone sends a picture of the club to Soo-gyum.
Episode 5
The club tracks the sender of the picture. At the climax, the doorbell rings in Mi-sook's house.
Episode 6
Hee-gyung is cornered by Sang-man's unreasonable demands. Su-ji threatens Jung-hye with the picture.
Episode 7
Seo-yeon misunderstands Mi-sook and Soo-gyum. A secretary is asked to shadow Jung-hye and Soo-gyum.
Episode 8
The club is looking for the culprit of the mysterious, threatening letter. All face their crisis.
Episode 9
The club uses Hee-gyung to flip the script. Soo-gyum and Jung-hye propose a deal to aid each other.
Episode 10
They use the last resort to scold Jung-wook. Byung-soo plans to separate Jung-hye from Soo-gyum.
Episode 11
Mi-sook leaves home with Seo-yeon due to Young-pyo's violence. The club members prepare for revenge.
Episode 12
Su-ji is asked to reveal the interview was fake. Young-pyo holds a press before the club discloses.