Maggie lies gravely ill in hospital while PJ desperately tries to find the cause of her mystery sickness.
The words Japanese Encephalitis strike fear into the heart of PJ. It's fatal, there's no cure-and it seems to be the cause of Maggie's illness. But PJ won't give up. Now the task is to prove the doctors wrong, to find a viable alternative and breath new life into his beloved Maggie.
Nick's reign as acting sergeant is rapidly turning into a nightmare as he deals with Keith Purvis and a mob of panic-stricken farmers. Having decided the spate of deaths had been caused by rabies, they slate the responsibility home to a couple of English migrants and their young daughter. Nick fulfills a promise to the girl and takes the dog into protective custody. However, the farmers follow them into town and Nick soon finds the station cut off from the outside world with a highly agitated farmer, the girl, her mother and their dog.
Tom had hoped to quietly recover from his heart attack, but now finds himself standing in the heat trying to negotiate with an angry mob who have the police station under siege.
Inside the station, tempers start to fray as Nick clashes with Adam and Dash. Frustrated by Nick's paralysis, the two young constables start negotiating with the farmer behind his back.