Hae-jun's mother, Seo-hyun, unexpectedly visits Yoon's Kalguksu to repay her debt, leaving Jung-jae puzzled as to what to do with it. Meanwhile, So-hee goes missing after leaving home to meet San-ha. Her disappearance reignites the unresolved conflict between Moo-sung and Jung-hee, resulting in San-ha's decision to distance himself from the family.

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.