Melbourne is burning. A mystery cartel is laying siege to the city's hospitality industry — firebombings, drive-by shootings, bashings at family homes — and nobody knows exactly who's behind it, or why.

Herald Sun crime reporter Seb Costello has been on the frontline of the story, breaking exclusive after exclusive using old-fashioned shoe leather. Adam and Seb unpack what's known, what's rumoured, and what keeps not adding up.

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