Jin Sook has three grown children, Eun Joo, Eun Hee, and Ji Woo. Her husband Sang Shik is a long-haul truck driver. If he isn’t out working, he’s hiking in the mountains. Jin Sook calls for a family meeting and declares to her kids that she wants to graduate from her marriage. Even with mixed responses from her kids, Jin Sook is determined to get her way.

Eun Hee feels flustered after she runs into Jong Min at her team dinner and does something she normally wouldn’t do. She goes to see Chan Hyuk and dumps all of her emotional baggage on him. Meanwhile, Sang Shik goes missing and the family file a missing persons report. He turns up in a hospital and doesn’t seem to recognize his kids at all.

Chan Hyuk rushes to Eun Hee’s office after getting a text about her new boss. He decides to coach Eun Hee’s relationship with him after seeing them together in person. Meanwhile, the 22-year-old Sang Shik goes home from the hospital and acts like a loving, doting husband. Jin Sook has a hard time getting used to this change.

Jin Sook goes with Sang Shik as he heads down to the Ulsan factory for work. When they get there, a young man named Young Shik appears, leaving both Jin Sook and Sang Shik feeling flustered. Meanwhile, Eun Joo and Eun Hee are shocked by the news that Sang Shik had tried to commit suicide. Later on, Tae Hyung heads to New Zealand for a seminar.

Sang Shik and Jin Sook head south to find Young Shik, but he is nowhere to be found. Meanwhile, Eun Hee stays by Eun Joo’s side as she tries to make sense of Tae Hyung’s secret. Ji Woo drunkenly blurts out the secret about Eun Joo’s father to Chan Hyuk. Finally, Eun Joo goes to see her mother-in-law when she can’t reach Tae Hyung.