Sleepover

The Sisters are having a sleepover at Lu''s. After watching horror DVDs in Lu''s bedroom, it''s time to go out to the summer house in the garden where they''re all meant to be sleeping. But there are all kinds of spooky noises outside and then the burglar alarm goes off. Lu''s parents aren''t sympathetic and don''t believe the girls when they say it wasn''t anything to do with them. But what was i...