The petition for the director of the university begins to gain momentum. As the campus is getting together to promote his resignation, Jin Joo worries about the director's son, Nam Gil. Ban Do tries to find out how he got to 1999 and how he can get back to 2017. After much research, he figures it out and runs to Jin Joo to tell her what he figured out.
이사장 퇴진 운동이 본격화되자, 진주는 이사장 아들인 남길이 걱정된다.
한편 반도는 2017년으로 돌아갈 수 있는 방법을 알아내고 진주에게 달려가는데..
