Badly planned trek across Dartmoor landscape brings four friends face to face with the Dartmoor Beast. Lost and afraid the terrified party has to fight for their own lives in desperate attempt to survive the night.

20-year-old Will is on his stag-do when, handcuffed to a lamppost, he is rescued by Michael. The attraction between the two men is immediate. But back at Michael's apartment, Will is sent into a tailspin of shame and confusion.

Linda's out on her hen night, her fiance is out on his stag night. Linda is having major doubts about getting married, when both groups arrive at a club, to find the band fronted by her ex-boyfriend—and the love of her life—Peter. Linda has to decide: Does she stay and settle down, like her friends want her to, or does she chuck it all in and run away with Peter?

Best man Pob's secret plan for a surprise stag do at a plush countryside brothel is thrown into jeopardy when the bride-to-be insists that they take her overbearing right wing father, The Judge, along for what she believes is a harmless camping trip. Now the lads must find a way to ditch the no nonsense tyrant and make it t the 'Cock's Inn' by midnight or miss out on the Party of a lifetime.