Things aren't going well for The Inbetweeners, with three of the four having split up with their girlfriends, while Simon has discovered that dating Lucy isn't as great as he thought it would be. So Will, Simon and Neil decide to jet off for the Easter holidays and meet up with Jay who's spending his gap year in Australia. But while they're there they get into various misadventures involving a group of backpackers, a road trip through the Outback, and a trip to a water park gone awry.