In episode 4 Hong Shim rescues a young boy named Meok-goo from getting beaten by three other kids in the village. She starts up the Solutions Agency, a business she plans to have Won Deuk go out and do all the tasks to pay off their debt. Meanwhile, Kim Soo Ji takes Jung Jae Yoon out for a drink and in his drunken state, spills a royal secret to the police chief.
The main characters in Episode 4 are Won Deuk (who is actually the crown prince Lee Yool), Kim Soo Ji, Jung Jae Yoon, Kim Cha Un's servant/black assassin Moo Yeon, and the royal police chief Jung Jae Yoon