Lee Gak is thrown out of the building. Meanwhile, Park Ha's business location falls through and her business fails before it even begins. The boys help her make some money. Tae Moo proposes to Se Na. Tae Moo hits Lee Gak and he falls into the sea. He is taken to the hospital, but when he wakes he seems to be another person.

The Joseon 4 create more chaos wherever they go. Tae Mu and Se Na keep being their scheming selves. Park Ha teaches them to read and tries to teach manners to Yi Gak. He meets with the "grandma" upon her request. Yi Gak sees Se Na.

The Crown Prince and his men don't understand how they wound up at Park Ha's house and think things will be okay if they go to the palace. After dropping them off she leaves, and the Prince and his men get sent away by cops and they look for food. Eventually put in jail and were told that they'd be let out if they provided contact information. Remembering Park Ha's license plate they return to her and after breaking things in her apartment she's making them work to pay her back.

The story opens up in the Joseon era when the crown prince (Yoochun) is looking for his wife. Then, they go to the past and show the main characters younger selves in both times (Joseon era and modern times). This episode does a lot of switching between the Joseon era and Seoul (modern times). Mysteries and schemes happen in both times. The "Joseon Four" gather. The Crown Prince and his men time travel to the modern days.