I'll start off that I purely watched this movie for Kim Min Gyu. Unfortunately, it wasn't really all that great. It had some pretty decent jump scares and the CGI was okay. Way better than some other Korean horror movies. The story was your regular story of students doing dumb things after they've been told not to be there and after reading the messed up stuff that happened in the theme park. No originality whatsoever. The acting left something more to be desired. Overall, I gave it a little above a 4 because some of those jump scares really got me. 'A' for effort.