Oldboy
I can pretty easily say that this is without a doubt the greatest movie I have ever seen. Never had a movie kept me this engaged I was completely and utterly encapsulated into the story. Constant twists and shocks had me in complete and utter disbelief. 10/10 acting performances, 10/10 mind games, 10/10 action, 10/10 plot twist. This movie was an absolutely thrilling experience from start to finish.
I cannot wait for my first rewatch of this absolute masterpiece.