“Will I be able to understand it if I never saw the first two ‘Step Up’ movies?” asked a friend. Uh, you’ll be able to understand it if you have never seen a single movie and don’t speak English. All of the energy, imagination, and attention in this movie is on the dance numbers, which is where it should be, and it pays off just as we hope.

Here is the plot: Kids dance. There is a romantic misunderstanding. There is a big competition with a hundred thousand dollar prize. And kids dance some more. In 3D.

What little plot there is centers on Moose (returning from “Step Up 2 the Streets”) and his BFF Camille as NYU freshmen and Luke (Rick Malambri), a sort of ring-leader/father figure trying to keep his group together but behind on the rent and falling for new girl Natalie (Sharni Vinson of “Home and Away”). The World Jam is coming up. Can Moose finish his exam in time to be there for the preliminary? Will the rival team led by a rich snob cheat? Will some new moves save the day? Will there be a “Step Up 4ever?” Bring it on!