Rooftop Prince Episode 1
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.