Almost miss out on this high production drama! This show truly makes me admire soldiers/workers in the national diving unit. It is so fascinating to watch all 9 episodes - lots of small plot twists and even the CGI is really good (which is so rare. Most importantly, the actors are pretty good at acting, even the supporting roles.
The drama does not show much violence or blood and is not considered "scary". Rather, they covered and explained the cases extremely clearly.
Came for the actors, left with lots of knowledge.