On the day of Gong-boo and Hong-dan's wedding, the whole family gets together and welcomes the wedding guests. In the middle of the wedding ceremony, Gong-hee suddenly feels queasy and steps out, and Gong-boo spots an uninvited guest. Meanwhile, Chairwoman Hwang suspects that Ji-na might be seeing another man and tells Deok-soo to find out who it is.
