Before the first movie, there was high school. They missed the bus.

It's the first day of school when Dumb literally runs headfirst into Dumberer. It's a collision of the clueless, a meeting of the mindless and a bond of the brainless. Still just hormone-fuelled teenagers, Harry and Lloyd know they will be friends for life...but they just have to get through this disaster called school and this tragedy called puberty. No girl, no jock, no corrupt principal...will ever come between them. Like, for sure.
Now one of the most mimicked and memorable gross out comedies of all time gets the prequel it deserves.