Seol and Se Ju travel to the past and meet their past selves. After escaping the gunfight that broke out in Kyungsung, Seol and Se Ju find out that there is a secret agent hiding among Joseon Youth Alliance. Meanwhile, Sang Mi continues her plot against Seol, and Se Ju finds out that Sang Mi’s target is Seol, not him.
Elenco: Yoo Ah-in , Im Soo-jung , Ko Kyoung-pyo , Kwak Si-yang , Jo Woo-jin , Yang Jin-sung , Cheon Ho-jin .