The Screech Owls have won a contest that takes them to London, England, for a once-in-a-lifetime chance to play in-line hockey at historic Wembley Stadium. They leave the morning after Hallowe'en and arrive in time to celebrate Guy Fawkes Day in Britain.

But between trips to Madame Tussaud’s infamous Chamber of Horrors and the notorious Tower of London, the Owls become entangled in a plot so dangerous and frightening it makes Hallowe'en seem like a tea party.