Maggie and PJ are embroiled in a series of burglaries, which look as though they're originating from the school where Susan, Tom's daughter, is assisting as a relief teacher. PJ has analysed every possible link between the burgled houses. After eliminating the Juicy Rooster chicken delivery man he is left with no alternative but to investigate the school.
While Susan has her hands full with students such as Chloe Bassetti, who stole valuable coins out of her drawers and tried to hock them, PJ is convinced that an assignment Susan set was designed to find out details of where valuables are kept. Susan isn't happy being the immediate suspect but the Heelers can't forget her somewhat chequered past. Finally she explains that it wasn't her that set the assignment, but the principal of the school, Guy Ashfield, a problem gambler who has previously been investigated for embezzling funds.
Guy pleads innocence, and when a locket is found at the scene of a recent crime, it seems he's telling the truth - it's traced back to Chloe's mother, Domenica Bassetti. Unfortunately for the Heelers, it seems Domenica has disappeared - and neither Chloe or her older sister Natalie, know where she is.
A huge attempt at tracking Domenica down leads the police no closer to finding her - until PJ starts trying to get information from Natalie. He's sure Domenica is using the girls to cover for her, and finally Susan suggests that she mind the girls overnight and radio the Heelers when Domenica arrives.
Unfortunately, the girls are gone and there's no sign of Domenica - however, another burglary has been attempted, and the burglar was female. She was also shot by Henry Biggins, a man who believes it's his right to protect his home by whatever means necessary. However, when the Heelers find the burglar, they're shocked to discover that it's not Domenica Bassetti at all. The burglar's real identity and Domenica's fate are more intriguing than anyone could've guessed.
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