At the time of its settlement, Gunning was a frontier town, a remote rest stop on the Old Hume Highway that linked Sydney and Melbourne. The rolling hills made the area a perfect hideout for bushrangers and the highway brought wealthy travellers right to their doorstep.

Jay and Kerry Gribbin now live in Gunning's former lockup that was built in the late 1800s to help police the banditry. The original cells still remain intact underneath the building and the Gribbins are keen to learn all they can about how their home played such an important role in the town's lawless history.

But the stories of the Gunning house don't end with bushranger legends. Adjacent to the house is a grave that bears testament to one of the colony's most brutal murders. Lucretia Dunkley was convicted and sentenced to death for the slaying of her husband Henry Dunkley in 1842. Could it be that the infamous female murderess was also incarcerated under the house? The answer lies in determining the exact age of the building and Adam calls in an archaeological team to dig into the truth.