It's about the four friends Mie, Johannes, Noor and Elias, who all participate in an Astro Camp, which is a two-week course focusing on astrophysics. But suddenly it goes completely wrong when Mie and Johannes are teleported to the distant Planet 9. Now it is up to the children to find a way to get Mie and Johannes home again before it is too late. But hopefully the children can get help from their physics teacher Panda-Søren and the researcher Anna.