When Brendan Behan (Shawn Hatosy) arrives in Liverpool with a bag full of explosives amidst WWII, he's promptly caught and sent to a youth detention facility in Norfolk. It's run by a fair and open-minded warden (Michael York) who advises his inmates to behave themselves and all will be fine. That's easier said than done, though, as this confirmed Irish republican is not going to naturally fit in with his cohorts. One exception might be navy man Charlie Milwall (Danny Dyer) with whom he becomes quite thick. What now ensues combines a frequently toxic mix of politics, bullying and fluid…