A Bloody Graveyard Story

On a spooky night the three teenagers Tom, Leila and Petey head to an abandoned cemetery. Tom has the most fun scaring his two friends. He even brought an old leather-bound book and tells Leila and Petey that he wants to summon the "spirit of painful bloodshed." In front of an old grave, Tom begins the ritual, but something goes wrong. Did he just summon a real ghost?