My Favourite Thriller Film

Shutter Island is a film based on a novel by Dennis Lehane, it is directed by Matin Scorsese. The film starrs Leonardo DiCaprio who plays Teddy Daniels who is investigating a psychiatric facility located on the island named in the title, but later on we find out that he is the patient who he has been looking for the whole time.

Plot
Teddy Daniels comes home to find out that his wife has murdered his kids by drowning them in the lake. Hr then murders his wife and is sent to Shutter Island mental institution. But in his mind he is a detective who is finding the missing patient who has vanished from there cell. The film is about the struggles he encounters trying to find the patient yet in the end we realise he is mentally unstable and that the missing 67th patient is infact him.
There is a huge maguffin in the plot as we never realise that Leonardo DiCaprio is a mental patient, this keeps us from the truth and creates susupense and tension throughout the whole film.