On the eve of Anzac Day, Dr Blake bumps into a former British Army colleague at the police station, Major Derek Alderton. Alderton is in town, trying to track down two army deserters believed to be hiding out in the area. But before they can reminisce, Dr Blake is called to the morgue where the body of the attendant, Bert Prentice, lies with shocking injuries in a pool of blood. Chief Superintendent Lawson immediately suspects the former morgue attendant Ron Jackson. Ron was sacked to make way for the new boy, Hugh, and it appears Ron has also done a runner… what more evidence do you need? But when Constable Parks finds lowlife Gordon McRae snooping in Bert’s bachelor pad, he adds him to the list of suspects. Meanwhile on the home front, tension grows between Dr Blake and his housekeeper Jean. Convinced Blake doesn’t need her, Jean threatens to leave. Blake responds by wishing her well with a job interview! The mystery deepens when a local woman starts bothering Dr Blake with fake symptoms– even though she looks fine. Blake wonders who she is protecting.