Tells the story of a helper service that provides wives to single people needing partners to take to gatherings for married couples and school reunions. The story portrays Choi Sang Eun as she gets entangled with Jung Ji Ho, who is on a long-term exclusive contract for Mondays, Wednesdays, and Fridays, and Kang Hae Jin, who signs a new contract for Tuesdays, Thursdays, and Saturdays.