Synopsis

Santa has lost his good mood, as the bag he kept it in has burst. If Santa doesn't get his good mood back, it won't be Christmas. The elf/nisse agent A-38 sets the Nissebande/Elf Gang, which consists of Mr. Mortensen, Gemyse, Skipper, Lunte and Pil, on the job. In order for him to get his good mood back, the Elf Gang must find the four things that Santa's good mood consists of: a treat for the eyes, a tickle in the nose, a tickle for the ear and a trickle down the back. From their secret hiding place in a mill, the elves go on missions to find the different ones. They send their collected mood samples by bottle mail to A-38 who tests them with a mood-o-meter. At the end of each episode, Lunte serves rice porridge with a dollop of butter on it, which he throws with a spoon. The Elf Gang is also accompanied by St. Bernard's dog Julius, who every evening manages to push Mr. Mortensen out of bed, so he ends up sleeping on the dining table.