Ex-Metropolitan Police sergeant Jodie Parker and her new husband, DCI Nathan Withers, are honeymooning at a luxurious eco-resort on a secluded Cornish island. But there’s a twist: they’re undercover, as the resort’s owner has hired them to investigate a series of sabotages, and Jodie’s mum Shirley and daughter Daisy – and their dog, Germaine – have somehow managed to get themselves invited along too.