A young teenager wins a contest for a "Medieval Adventure" from a soda company. The winners, plus a film crew from the soda company arrive at the castle for the adventure. During the night, a spell cast over 600 years prior brings the castle and all the people in it back to 1383. The evil Lord Raykin plans on retrying to take the castle. It is up to the group to stop him, and thereby return to the 20th century. They enlist the help of the former court magician, Percival, to help them.

As the millenium draws near, an evil being awakens. Fused to an ancient Talisman for centuries -- Theriel, the Black Angel is summoned from his resting place to usher in the end of the world. The ghastly messenger must claim seven human sacrifices to complete the ritual and open the gates of Hell. A teenage boy and girl have been chosen to assist the angel in its deadly mission, yet they alone are the world's only hope for salvation.