Cain and Abel

I'll tell you about the summary of the drama first. If ever you'll find this as an spoiler, you may feel free to stop reading. I hate spoilers, too. Anyway, back to the summary, this drama was about brothers, Lee Sun-woo and Lee Cho-in. Cho-in was the father's apple of the eye which made their mother hate him because he was an adopted child and she thought he was her husband's son with another woman. And so that made Sun-woo her own apple. It was originally Seo-yeon, a girl who has a heart ailment and whom they met and together grew up with in the famous Bosung Hospital, and Sun-woo who were called the "it-couple" but when Sun-woo went overseas to study and to make his father proud of him, Seo-yeon's world fell apart. Finally, after seven years of pain, she gave chance to Cho-in who had stayed there beside her when she thought she'd die when Sun-woo left. To tell the rest of the story short, Sun-woo finally decided to have revenge to Cho-in, thinking that Cho-in took everything away from him, their father's love, the Bosung hospital and of course, Seo-yeon. Sun-woo wanted him dead. After few circumstances, Cho-in met a North defector girl named Oh Young-ji who wanted to bring her family to South Korea. It was at China where Cho-in met Young-ji as his tour guide because Sun-woo had sent him there to see for himself a surgery that was currently being disapproved by Cho-in to be performed to their father who's presently at comatose state. Cho-in had lost all his memory at China and was given the name Oh Gang-ho. After living a life as a North defector himself at China, he finally was able to come back to Seoul, still as Gang-ho, determined to know who he was and why somebody had tried to kill him at China, and to fulfill his promise to Gang-chul, the person who had given him his present identity and the one who saved his life a few times already, to find and protect his younger sister, Young-ji. Meanwhile, Young-ji, upon seeing Cho-in and Gang-ho as only one individual, decided to keep it a secret because if she'll not tell that Cho-in was Gang-ho, he might be deported back to China. They went to Cheondeong to try to live peacefully. But after some time, Young-ji was finally able to tell Gang-ho who he really was and after a car accident, all his memories came back once and for all. He decided to come back to Seoul to find out who and why somebody had tried to kill him. Finding all the missing pieces to the puzzle but one, the one who tried to kill him, was Sun-woo all along. Sun-woo was suffering a brain tumor that was an after effect of the tumor he has seven years ago. It was getting more dangerous and after finally revealing the truth to his younger brother, he gave Cho-in the chance to either save him or kill him. He said as quoted, I wanted to live or die in your hands. Cho-in finally saved his own brother.