Saurus Street is just like any other street ... except for the dinosaurs! Tom and Tam are horrified when they find out Great Aunt Gertrude is coming to stay. She's got bad breath, smelly feet and her false teeth like to bite. It's time for the twins to put their thinking caps on. They need to get rid of her, fast. Luckily they've got a secret weapon - their very own velociraptor - but it's a naughty one and it keeps getting them into trouble. In a fight between a vicious velociraptor and a ferocious great aunt, there can only be one winner!