Another one of those Korean films that is impossible to place in a specific genre. The atmosphere is a comedy, and the plot is a thriller, with elements of action, drama, and adventure. The film is at times casual and relaxed, and at times bloody brutal, as if I am watching two movies at the same time. In my opinion, the comedic elements are misused and prevent the viewer from enjoying the seriousness, tension and twists in the plot. The plot has a lot of twists and turns and thus constantly makes the movie more and more interesting.

The actors are very good and special praise and respect should be given to the female actors and stuntmen who spent a large part of the film diving underwater.

I also really like the choice of music. At times, the musical numbers seem forced as if they were selected on a jukebox, but I'll forgive that because I like the style of the music and even wish there was more of it. Actually, now after the movie I'm going to listen to some Korean trot and evergreens from the golden seventies.
And yes, one spoiler, at the end I even noticed some dolphins ?