||If you're going to swipe from "Star Wars," which itself borrowed from legends and stories going back to the Old Testament, you'd better do it with verve. Prince of Persia sweeps across the screen with uncomplicated panache, mild claims to epic status and stock but enjoyable personalities. It's probably too much to demand surprises in the story or characterizations of a rollicking summer blockbuster. And on the scale of summer action films, this is to the Transformers sequel what an Andy Warhol print is to a first-grader's refrigerator painting...I haven't played the video games on which the movie is based. The savvy gamer who went to the preview with me says the film borrows from all four Prince of Persia avatars, concentrating on the earliest and latest: The plot about a dagger that can reverse time is in the first; the wisecracking monarchs who team up come from the fourth...There are a few nominal surprises, but the writers don't really expect you to be surprised. We don't find out for a while that Kingsley's wicked uncle is affiliated with a banned tribe of killers called the Hassansins ? they do political hassansinations ? but it's hard not to suspect a character with a shaved head, pointy goatee, thick eye shadow and a habit of lurking in corners and muttering...Nor does the plot make sense, even in fantasy terms. We're told that chaos and the destruction of humanity will result if anyone sticks the dagger into a magic hourglass that controls the flow of time, except that ? it doesn't. (That whole turning back time thing always makes any plot seem inconsequential: No matter what terrible things happen, you can "fix" them by just starting over.)...Yet the outcome is not the point here; the journey is. We've come to the theater to enjoy the cinematography of John Seale, who won an Oscar with desert locales in The English Patient, or the parkour-inspired fighting style of the prince, who can use anything as a stepping-stone: crossbow arrows stuck in a wall, the backs of camels, even the body parts of his foes. On those kinds of counts, Persia delivers what we'd want on a lazy summer's day.