Descendants of the Sun is probably one of the most popular Kdramas as of date. That's what you can expect when you pair up Song Hye Kyo and Song Jong Ki. The story was unique, and the whole plot didn't have any plot holes. The problem here is that after the core 4 (Song Hye Kyo, Song Jong Ki, Kim Ji Won, and Jin Goo), the other supporting characters failed to deliver the same level of emotion. Another problem of the show is that like any other non-fantasy Kdramas, the rewatch value struggles a lot because nothing will entice you back once you know how the story unfolds.