A dubious old friend of Jeff, Kevin O'Malley, suggests to the cash-strapped detective that they steal old bank notes being taken on a lorry to be incinerated. The money is stolen but neither Kevin nor Jeff have got it and Jeff gets arrested as the chief suspect. The actual thieves are two women who perform a stage act. They plan to fly the money out to France but Marty uses his skills to ensure that their plane lands exactly where the police are waiting to arrest them.

Having reunited the far-flung members of the Crackan family for a gathering where patriarch Joshua will decide which one of them should be his heir, Jeff tells Marty he wants to end their partnership. However, when members of the Crackan clan start to get murdered it is Marty who saves the situation by communicating with Fay, the last survivor, as she goes into a trance assisting a stage hypnotist and getting her to call the police and Jeff is made to re-consider his hasty decision.