It’s been a long time since Caine, Bronson, Angus and Wendell—aka ‘The Chain Breakers’—escaped a torturous Vietnamese POW camp. They now find themselves sharing a new prison, The Hogan Hills Retirement Home for Returned Veterans. Each of the boys has an unrealised dream they want to achieve, so they band together to devise a plan to escape their new hell. But the rules of engagement have changed. In fact, they can’t even remember what they were—and that’s half the problem.

Reg and Lindsay run an organic fertiliser business. They need a fresh supply of their “secret ingredient” to process through the meat grinder. Reg comes across two guys and a girl with a broken-down vehicle on their way to a music festival.