Margot, Wesley and Josephine have got an awesome weekend mapped out for the end of the holidays before they start high school – and they don’t want anything to stand in the way of their big plans in London. But when they are staying with Margot’s mum and her new boyfriend Teddy in Notting Hill, something happens that they just can’t ignore. Join the kids as they follow the case across wild West London, following the trail of a super creative murderer, as well as some epic street art.