Cloud Stairs

Cloud Stairs is a 2006 South Korean television series starring Shin Dong-wook, Han Ji-hye, Im Jung-eun and Kim Jung-hyun. It aired on KBS2 from September 18 to November 7, 2006 on Mondays and Tuesdays at 21:55 for 16 episodes.

Plot
Jong-soo has no other choice but to give up going to medical school due to financial difficulties. He leaves for a remote island without telling anyone his whereabouts. On the island, he meets a doctor who teaches him medical techniques and begins to treat patients without a license. One day Jong-soo rescues Jung-won, a dying woman by mere chance, and is mistaken for a talented doctor. But things get messed up as he continues to meet with Jung-won, as one misunderstanding spawns another. He ends up falling in love with her, and gradually finds himself addicted to love. To protect his feelings, Jong-soo keeps lying about his educational background and tries to escape from his past. But when he reaches the pinnacle of his "success," he realizes that everything he has done so far was in vain. His love turns into poison and ruins his life.

Main characters

 * Shin Dong-wook as Choi Jong-soo
 * Han Ji-hye as Yoon Jung-won
 * Im Jung-eun as Oh Yoon-hee
 * Kim Jung-hyun as Kim Do-hyun

Supporting characters

 * Choi Jong-won as Doctor Byun
 * Kim Yong-gun as Doctor Yoon, Jung-won's father
 * Yang Geum-seok as Jung-won's mother
 * Lee Mi-young as Yoon-hee's mother
 * Yeon Kyu-jin as Director Kim, Do-hyun's father
 * Kang Joo-hyung
 * Jang Ji-min
 * Kim Sang-won