The a close-knit group of rebellious London teenagers are on a getaway in Rotterdam - but after the estranged father of Tara is discovered dead, they find themselves on the run across Europe with three kilos of heroin and a host of deadly criminals snapping at their heels. 

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Leading the hunt for Tara and her childhood friends – reckless Stink, sharp Ruth  and loyal Nessi  – is Tara’s uncle Reagan, a notorious gangster haunted by his past who will stop at nothing to track down his missing cache of drugs. But Reagan isn’t the only person they should fear – because all the while a terrifying and mythical serial killer known only as ‘The Traveller’ draws closer, on a collision course with them all…