Two groups of mates are jetting off to the party ski resort of Tignes in the French Alps.
19-year-old mummy's boy Max from Hemel Hempstead barely lifts a finger at home, because his mum does it all. The ski instructor and club promoter still lives with his mum and relies on her for almost everything. Unbeknown to Max, she is gate-crashing his first ever lads' skiing holiday to find out how he copes without her. Joining Max on his alpine adventure are best mate Matt and fellow ski instructor Josh.
In Manchester, 20-year-old party-hard student Daryl is heading off from her student digs for her first ever ski trip. Since Daryl left home for uni two years ago, mum and dad have been in the dark about her wild ways, but they are about to find out. Daryl is heading off with her two uni mates and rugby team pals Rosa and Robyn, whose motto is 'go hard or go home'.
As the holiday begins, for the girls it's no-holds-barred boozing and partying till dawn. Meanwhile, Max struggles to adjust to his new surroundings. On the slopes, ski instructor Max shows off his skills, but novice skier Daryl finds it tough going.
What they don't know is that their parents have arrived to spy on their every move and see just what they get up to when they're away from home. In the most daring spy mission ever, Daryl's dad gatecrashes a fancy dress party, making direct contact with his daughter and almost blowing the parents' cover.
As the parents watch their children's antics, Daryl's mum and dad become increasingly worried about her boozing, while Max's mum rethinks her mollycoddling ways.