The Teenage Mutant Ninja Turtles are back, repackaged via computer-generated animation for the 21st century as "TMNT," with mixed results.
As the film opens, narrator Laurence Fishburne tells the audience about a figure known as the Warrior King, who opened up an inter-dimensional portal during an epic battle and unleashed 13 monsters bent on world domination.
As a result of his actions, he inadvertently became immortal at the expense of his crew.
Flash forward to the present day, where the Turtles - Leonardo, Raphael, Donatello and Michelangelo - have drifted apart after defeating their old nemesis, The Shredder. Leonardo (voiced by James Arnold Taylor) is in Central America where his sensei, Master Splinter (veteran actor Mako, who died last summer) has sent him to train.
Archeologist and longtime Turtles ally April O'Neil (Sarah Michelle Gellar), who's on assignment to retrieve an artifact for mysterious billionaire industrialist Max Winters (Patrick Stewart), finds Leonardo and tries to talk him into coming back home to New York.
Back in the city, Donatello (Mitchell Whitfield) is biding his time as a computer tech-support representative, Michelangelo (Mikey Kelley) is entertaining children as a for-hire party clown in a turtle suit, and Raphael (Nolan North) is moonlighting as a masked crime-fighting vigilante known as "The Nightwatcher."
When April and her Casey (Chris Evans) drop off the artifact at Winters' estate, it becomes clear there's something amiss, as freak incidents start to happen around the city.
The worst is confirmed with the return of the Turtles' other arch-nemesis - The Foot Clan, headed by Karai (Ziyi Zhang) - who appear to be in league with Winters, who's out to bring back those ancient monsters to do his bidding.
The fourth Teenage Mutant Ninja Turtle movie and the first to use state-of-the-art computer animation, "TMNT" is more in spirit with the darker tone of the original comic book series than the more jovial animated series and live-action feature films.
And that's a good thing.
Unfortunately, the predictable story and hackneyed dialogue - the interplay between April and Casey is particularly bad - get in the way of the movie's slick and sleek visual style.
Stewart, Zhang, Mako and the four actors voicing the turtles, particularly Taylor and North, make the most of what they get.