Stop! Monsters!Mark Janssen is a master in creating worlds where everything is possible. Previously we joined two brothers on a dinosaur hunt in a magical forest in Dinos Don't Exist and travelled the oceans on the back of a giant turtle in Island. This time Mark Janssen invites us to help two sisters who want to get rid of a trolley full of what seems to be rubbish. But on their way, big scary monsters try to stop them What are these terrifying creatures after?