Anyway, the main plot is about two brothers (not blood-related.
There are loopholes or inconclusive points (or maybe i just missed them?) like who treated Ji Sub's injury when he was saved from the desert, where did his seemingly heart surgery scar came from etc etc. The downside to that however, is the whole story becomes seemingly too much given the hospital backdrop, to the point when I sometimes thought, "Geez, this is getting ridiculous". Instead of going for detective-gangster brothers rivalry, they showcase two talented brothers as surgeons, who of course, fall for the same woman (as expected) before another female lead comes in and completes the square. In the end, I'm glad they changed the plotline.
Besides, I wasn't really into the original cast list (except for So Ji Sub who was the only main cast who remained after the production was put on hold indefinitely for reasons I wasn't really interested to find out, since I wasn't interested in the series anyway). Well, we've heard and seen (or at least, I have) about this kind of plotlines all the time - in music videos, story books, dramas, that it sounded a little cliche. The original plot was about the rivalry between a gangster and his brother who is a detective (go figure!). Initially, I think it was some time last year, when this series was first announced, I wasn't interested in the story at all. I recently finished the Korean drama Cain & Abel, which starred one of my favorite actors, So Ji Sub.