Roberta "Bobby" Rowe is not one to believe in ghosts. Daring a bet at her ridiculous and creepy boarding school on Halloween is no problem. Especially if her best friend Naya and cute local guy Kane agree to take part too. They are ordered to summon the legendary ghost of "Bloody Mary": say her name five times in front of a candlelit mirror and she will appear... But, surprise surprise, nothing happens. Or is it still happening? The next morning, Bobby finds a message on the bathroom mirror... "Five Days"... What does it mean? And who left it there? Things begin to get weirder and creepier for Bobby and Nia until it becomes clear that Bloody Mary did answer the call from the other world that night, and she is definitely not a friendly ghost. Now Bobby, Naya and Kane must race against time before five days are up and Mary comes for them, just as she has come for others countless times...