A family road trip is supposed to be a lot of fun... unless, of course, you're the Heffley's.

The journey starts off full of promise, then quickly takes several wrong turns. Petrol-station bathrooms, crazed seagulls, a fender bender and a runaway pig - not exactly Greg Heffley's idea of d good time. But even the worst road trip can turn into an adventure - and this is one the Heffley's won't soon forget.