Cheol-woo takes Hyun-jin, the woman she is about to marry, to her hometown with a trembling heart to introduce her to her family. Fortunately, Cheol-woo's father, Kyung-su, is very fond of Hyun-jin and despite not being married to her, she suggests that Cheol-woo live with him while on a business trip. In addition, Kyung-soo, worried that Hyun-jin would be uncomfortable, invites her eldest sons, Jung-woo and Joo-eun, to create a strange atmosphere...