Documentary following the work of pest controllers. It is claimed there are four thousand rats born in London every hour. With stats like this it is no wonder pest controllers Ricky and Jimmy Clark are always busy. Along with Charlie, their rat-seeking Jack Russell terrier, the brothers find a monster rat in a sofa bed. Ricky escapes to the country to sort out some rabbits, and Jimmy is called to a wasp job but is worried they are bees.