Stu et al watch Clem operate on Ant, while Selma learns about a case being built against her. Greg escapes to meet Stu - they were in on this together. Stu accidentallyhugs Greg as Selma finds the others, demanding to know Greg's whereabouts.
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.