The search for heirs to the estate of James Cheetham reveals a family history of both great strength and sadness. A sporting legend is discovered in the family tree, as well as the tragedy of one of Britain's worst transport disasters which took the lives of some of his family and revealed the heroism of another family member. The case of John Donaghy sees Michael Buerk and the heir hunters take a gamble that could send them down the path to disaster and uncovers an uncle involved in greyhound racing in its prime.