Every day Theodor (8) is bullied by Bremer (12), and today is no exception. After school, Bremer holds Theodor upside down to shake the money out of his pockets. When Theodor's sister Vilja (10) rescues Theodor with the help of her slingshot, the two siblings must seek shelter in the house of the eccentric, colorful artist Mister Tusj. He has had to deal with bullies like Bremer in his past, and let them stay with him – on the condition that they use his crayons to create ART.
When Theodor and Vilja see that Mister Tusj has a magic brush that can make drawings come to life, they get an idea of how to get back at Bremer. Vilja draws a dinosaur, and with the magic brush, Theodor gives life to it. The dinosaur chases Bremer, and he must seek shelter on a roof. Theodor seems to have gotten his sweet revenge, but it turns out that the dinosaur is pregnant and suddenly she gives birth to three angry kids. When the kids climb up on the back of the mother dinosaur, they manage to get up on the roof where Bremer is sitting.
The revenge has gone too far, and Theodor and Viljal must try to save Bremer – ideally without Mister Tusj discovering that they have thwarted his magic brush.
Finally, Theodor and Vilja manage to catch all the dinosaurs and rescue Bremer, who regretful hands Theodor back his money. Sometimes the pencil is stronger than the sword.