I'm doing this review after I've watched all three seasons of the series, but I'll forget the other two to focus on how I felt watching season 1. Honestly, I think it's one of the most exciting and addictive Korean dramas I've ever seen. The story hooks you almost from the first minute and keeps you desperately impatient to see what happens in the next episode, which is its best virtue. Obviously, it is an ensemble story, where all the characters are very important within the story and almost all the subplots are very interesting. It is a perfect mix of comedy, drama, action, and suspense, an intense, convoluted, and funny tragicomic thriller. The main characters are very charismatic, both the heroes and the villains, especially the three leading women (Shim Su-ryeon, Oh Yoon-hee, and Cheon Seo-jin), and the leading male villain (Joo Dan-tae). The story of the character Min Seol-ah, whose murder is the cause of all the action this season, is quite moving, I empathized with her a lot. The characters of the rich, both the adults and the young, are so despicable that it is impossible not to hate them and want them to suffer the worst revenge (although at least the adults are charismatic and funny). In general, the plot is well constructed, to be exciting and fun, although it is evident that it has a lot of melodrama, in the style of a soap opera (which is normally something negative but here it is forgivable). Although there are little things about the plot that I don't like, watching the entire season is such an enjoyable and exciting experience that in the end, the rating has to be a 10. The ending would be disappointing if it weren't for the fact that it is an open ending to allow a second season. In conclusion, it is a fun story of intrigue and suspense with a good dose of action and drama. The opening credits sequence deserves high praise.