We open with a freckled kid shooting a porcelain cat off his friend's head with a bow and arrow. Luckily, he's a good shot and doesn't, you know, shoot his friend in the face or anything. Then Freckles -- clearly the boss in this friendship -- tells the other kid he's making a film and that the friend gets to star in it. Hey, it beats getting shot in the face. Next thing we know, almost-shot-in-the-face friends is yelling into the camera, "I! Am the Son of Rambow!" I have no idea why Rambow is spelled that way other than maybe someone thought, "Well, how can we make it clear this is about kids?! Oh, kids can't spell, right? Let's use that!" Anyway, Freckles is confused: "You want to be the son of Rambow?!" Turns out Son of Rambow is the bad speller in question. It also turns out he's not supposed to be friends with Freckles because of Son of Rambow's religion. If he's friends with Freckles, he'll be in the worst trouble ever. But he's the Son of Rambow, so he throws caution to the wind and shows up at Freckles' house to finish their movie. It's really a dangerous little film. But everyone wants to be in it. Problem is Son of Rambow, whose name is Will, starts to take over and the friends start bickering. From the looks of this trailer, their little film involves Rambow, Son of Rambow, ninjas, rock stars, and lots of other random stuff that kids and teens might put into a self-made film. Lucky for us, their film within a film will probably make this a pretty delightful movie. At least, according to the trailer, every festival in the world seemed to think so.