Topper and Viggo are best friends and they live in the same house, where Viggo's father is an proprietor of a pub, called the "The Blue Sea Cat". Viggo has both his parents with him, but Topper only has his mother. His father is a sailor and is hardly ever home. Therefore, Topper misses him incredibly much. Topper is also secretly in love with a girl by the name of Sille. One day, Topper finds a pencil with which he writes "I love Sille" on a wall. When he discovers that Sille is approaching him, he stands in front of what he has written, so that she will not see it, since he's too shy to show it to her. However, she demands to see what he has written and he is forced to show her. But the writing is gone and he starts to wonder if there is something magic with the pencil. He and viggo decides to really try it out and they draw a rhinoceros on the wall (covered with yellow wallpaper) in Topper's apartment. However, the rhino doesn't vansih, as they think it will, but it comes to life
Topper finds the summer holidays a bit boring and feels a bit daft being crazy about a girl he can't make head or tail of. To add to his problems, Topper misses his dad, who is off sailing the seven seas or who knows - perhaps even further away than that. But one day, Topper finds something amazing, and suddenly life isn't quite so boring after all. He finds a pencil - not an ordinary pencil, mind - that wouldn't be special at all. No, this one can do magic! Together with his best friend, Viggo, Topper is about to discover all the incredible things this kind of pencil can be used for. Topper and Viggo live in the same old, red brick building. The ground floor is occupied by the Red Catfish Café owned by Viggo's dad, Mr Lion. Topper lives on the second floor - and it is here that he and Viggo draw a rhino on the wall - a yellow rhino with three horns. They don't have to wait long for something magical to happen. Moments later the rhino comes alive!
Nikolai Aamand : Viggo (voice) Noah Crone Back : Jakob (voice) Lars Brygmann : Hr. Løwe (voice) Kaya Brüel : Toppers Mor (voice) Rebecca Brüel : Almanda (voice) Asta Danielsson : Sille (voice) Helle Dolleris : Fru Løwe (voice) Søs Egelind : Lærerinde (voice) Mikkel Brinch Hansen : Albert (voice)