The friends Emmett (Happy Mahaney), Freddy (Josh Holt), Marie (Nicole Rayburn), Kevin (Jilon Ghai) and his reluctant girlfriend Jessie (Trish Coren) decide to spend the Halloween night in an abandoned hospital. Meanwhile, the younger Allan (Michael Samluk ) meets the old friend of his father Arlo Ray Baines (Dig Wayne) and asks him to help to find his vanished sister Meg (Rachel Melvin) in the same spot. The two groups meet each other in the mental institution section on the haunted third floor and they find that they are trapped in the place. Jessie has visions from the past and discovers that the ghost of Jacob (M. Steven Felty), a former patient that raped a little girl and burned the hospital, is trying to escape possessing their bodies that melt down with his evil spirit.
"Boo" is a messy ghost story, with a confused screenplay and poor development of characters, especially Jessie. This lead character and her relationship with her mad mother are the key point of the story, but their stories are awfully disclosed. Further, the character Kevin acts like an annoying moron. The group using an old elevator that works in an abandoned building is ridiculous. However, I startled in some moments with the eerie atmosphere. My vote is five.
Title (Brazil): "Hospital Maldito" ("Damned Hospital")