Enforcement officers Dan and Jude are on the hunt for fly-tippers and rubbish dumpers blighting the beautiful countryside of the Malvern Hills, while Rob, Gary and John deal with the rivers of fat and wet wipes blocking London's sewers. In Wolverhampton, cleaners Jakob and Wojtek face a toxic clean-up thanks to someone storing 50 bottles of urine in a cupboard, while across the city a crime scene is in urgent need of a deep clean.