A prince from the Joseon era, Lee Gak, is catapulted 300 years forward into the future in Seoul 2012 with his entourage, which includes Song Man Bo, Do Chi San and Woo Young Sul, when he tries to investigate the suspicious circumstances which surround the death of the girl he loved. In the present, he finds a girl who looks exactly like his beloved crown princess...
- Micky Yoochun as Yong Tae Yong / Lee Gak
- Han Ji Min as Park Ha / Bu Yong
- Lee Tae Sung as Yong Tae Moo
- Jung Yoo Mi as Hong Se Na / Hwa Yong
- Lee Min Ho as Song Man Bo
- Choi Woo Shik as Do Chi San
- Jung Suk Won as Woo Yong Sul