When cops on the English coast busted a bid to bring in a huge shipment of cocaine in 2020, it sent shockwaves through the underworld hundreds of miles north in Scotland, where the drugs were destined for, and reignited a bitter feud between the Lyons and Daniel crime families that had simmered for almost two decades.

Today, with a third, international gang entering the fray, the feud has spilled into all-out war, with residents of Glasgow and Edinburgh watching in horror as homes burn and bodies drop. But how did it all begin — and where will the violence end?

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