San-ha stays in Seoul to look after his step-sister while his mother recovers from surgery. Ju-won goes to Seoul alone to surprise him without telling the rest of the family Meanwhile back at home, Jung-jae collapses from overworking, scaring everyone, especially Hae-jun, who makes up his mind about going to the US.

San-ha and Hae-jun come back on Ju-won's birthday after ten years. Though they haven't seen each other for years, unlike what Ju-won had imagined, she feels indifferent about their return and is not happy to see them. Meanwhile, the family finds out a shocking truth about Hae-jun at Ju-won's birthday celebration.