This movie was one of the most perfect action movies I've ever seen Firstly it's Netflix series,and it end with cliff. When movie starts, you're like"why I'm seeing naked people's"but later on, everything turn out to adrenaline rush,the actors, actress, characters, happenings are just perfect.You can not like this movie, because everything is perfect, Koreans should do more action movies. That's one thing I like about Korean movie industry. they always do perfect at horror and action movie. if you're interested in South and North Korean ,virus related thing,about how people reacts it,how action thing can be perfect just watch it. you'll never be disappointed I assure this