The scar at the bottom of Hang Ah's heart is made in to a public joke by Jae Ha. However, Hang Ah's tears causes Jae Ha to feel guilty and dejected too. They decide to determine the winner on a treadmill in a war of words. But Club M places a bomb on the treadmill, which endangeres their lives...
Ha Ji-won
Kim Hang-ah
Lee Seung-gi
Lee Jae-ha
Lee Yoon-ji
Lee Jae-shin
Cho Jung-seok
Eun Shi-kyung
Yoon Je-moon
Kim Bong-gu
Youn Yuh-jung
Bang Yang-seon (the Queen Mother)
Lee Sung-min
Lee Jae-kang (the King)
Lee Soon-jae
Eun Kyu-tae
Jeong Man-sik
Rhee Kang-seok
Kwon Hyun-sang
Yeom Dong-ha
Park Gun-tae
Lee Jae-kang (young)
Kang Han-byul
Lee Jae-ha (young)
Kim Yun-tae
Ah Mu-gan
