two U.S. Marshal sent to an island called Shutter Island in Massachusetts to investigate the disappearance of a woman named Rachel Solando.
Shutter Island is the name of an island where a Hospital named Ashecliff reserved for criminals who are suffering from psychiatric disorders. There, the hospital was reluctant to give a clear explanation for the loss of Rachel. Rachel was introduced into the hospital after being accused of drowning her three children. However, she still thinks that he is still at home and her children are still alive.
In its investigation, Teddy and then managed to get the information that is actually held Ashecliff Hospital horrible experiments on humans. Teddy also managed to find a cave where the original Rachel hiding. After that Teddy even get information from Dr. John Cawley that he was actually Andrew Laeddis, not Teddy Daniel.