Dominic Littlewood presents a series looking at the work of fraud investigators searching out benefit thieves and meets the people they are stealing from - the genuine claimants. An abandoned suitcase full of documentation sets off alarm bells in Croydon's fraud office leading investigators to a woman claiming thousands of pounds worth of housing benefit she wasn't entitled to. And Ian Leech, a loving dad and a devoted football fan, takes on the system when when his daughter is diagnosed with cancer.