'Shutter Island': Shattered sense of reality?

A deep plunge into the psyche of an intriguing, stormy-eyed young man

The movie starts off on an eerily alluring musical connotation right with the logo of Paramount Movies. This then slowly develops into the location of events which, we're told, is an oddly-shaped, murky and peculiar island off the coast of Boston. There are two main characters that the story seemingly revolves around; Deputy U.S Marshal Edward Daniels (Teddy) and Ben Kingsley. 

The movie takes us into an investigation being conducted at a war-time psychiatric institution attempting to solve the disappearance of a patient in the facility who had allegedly drowned three of her children. 

The lead detective, Mr. Teddy, makes it his life's goal to find out where this young woman has run off to. Amidst being a hero by day and...well, by night; Teddy seems to be having excruciating migraines and fiery flashbacks of a death he'd rather not remember. 

Filled with delusions of a nonexistent life, a day that never happened, and perpetrators that hoped to stay submerged... Shutter Island does to one's mind what a ride down a roller coaster does to one's stomach. 

Although convoluted, it sure is a freakishly clever story line brought to life by director Martin Scorsese.