The Metropolitan Police team up with insurers to close in on a criminal gang deliberately causing crashes with innocent motorists so that they can submit fraudulent insurance claims. A lorry driver's personal injury claim stalls when surveillance footage captures him doing the things he claims he can't, while two former prison mates come unstuck when they hatch a plan to cash in at the expense of their insurers by staging a car accident. A man hoping to tie the knot makes an indecent proposal on his claim form, and a bus passenger's claim goes belly up when it's captured on CCTV.