if anyone has not heard of shutter island, it's a thriller, horror action movie/book/manga.

"The year is 1954, U.S. Marshal Teddy Daniels
and his new partner, Chuck Aule, have come to Shutter Island, home of
Ashecliffe Hospital for the Criminally Insane, to investigate the disappearance of a
patient. Multiple murderess Rachel Solando is loose somewhere on this
remote and barren island, despite having been kept in a locked cell
under constant surveillance. As a killer hurricane bears relentlessly
down on them, a strange case takes on even darker, more sinister
shades—with hints of radical experimentation, horrifying surgeries, and
lethal countermoves made in the cause of a covert shadow war. No one is
going to escape Shutter Island unscathed, because nothing at Ashecliffe
Hospital is remotely what it seems.- Official Synopsis written by author
Dennis Lehane."

so to keep it simple, are you going to go see the movie or read the manga and/or book?