Under The Man's instruction, Stu gets the gang jobs in the prison coke factory while Hugo works a special job for Selma - the sleepytime of her brother at a dinner being thrown for their boss. Things go awry. Stu's betrayal unspools. Blood spills.
Groom-to-be Stu and his friends are on his stag do in South America. What was meant to be a week of drink, debauchery and fun takes a dark turn. Instead of boarding a flight back to the UK, the stags are sent to a lawless prison island run by two warring siblings.