A college student goes on vacation to a South American country after learning he has cancer, and gets involved in the local civil war after his best friend is kidnapped by the revolutionary guerilla.
A group of teenage, treasure seeking, grave robbers accidentally uncover the tomb of a satanic sect leader from the early Spanish colonial age, reawakening the diabolical killer, who promptly sets out to complete his unholy mission of spawning the son of Satan.
On his 17th birthday, a boy named Michael has a surprise party thrown by his friends, where a session with a Ouija board accidentally unleashes a demon named Virgil, who possesses one of them to go on a killing spree. Michael, now plagued by violent nightmares and premonitions, sets out to try and stop the killings.