In Highgate London, five young teenagers hoping to witness Pagan activity, camp in historic Queen's Wood on Halloween but soon discover they are part of the ritual when a mysterious Biker hunts them down.

The girls of St. Trinians are on the hunt for buried treasure after discovering headmistress Miss Fritton is related to a famous pirate.

When their beloved school is threatened with closure should the powers that be fail to raise the proper funds, the girls scheme to steal a priceless painting and use the profits to pull St. Trinian's out of the red.