4 ideas
The cases run into developer money, a state government facing an election and a police command that wants clean, fast answers. Meanwhile his marriage fails, his teenage daughter Lizzie goes missing into drug use, and bushfires threaten his father's bush property.
Institutions under political pressure do not simply hide facts. They choose which true account becomes official according to what protects budgets, elections and careers. An honest investigator can establish what happened and still lose, because the finding has to pass through people whose interests decide whether it is spoken, filed or buried.
The skills that make someone expert at reading strangers, such as suspicion, detachment and focus on evidence, can leave them blind to the people closest to them. Villani reads liars and killers accurately but misses his daughter's unravelling and his own marriage's decay. The job's demands take the attention those relationships need and also train a stance that damages intimacy.
A natural catastrophe like a bushfire is indifferent to press management, factional deals and official narratives, so it exposes what institutions and individuals actually are. Against the city's negotiable truths, the fire gives an unarguable reality where only physical competence and loyalty count.