 Darko, the lonely space voyager, finds himself in a new situation. He has a new stepfather, Marko, and stepsister, Matea, who he doesn t like. Darko sees Matea as competition and senses that almost instantly she s won over his mother, his best friend Mali, and even Karmen. But what Darko doesn t know is that Matea feels at a loss in her new environment, without her old friends and without her mother. She has little patience for Darko, who seems unwilling to give up anything; especially not space in his room and the regular visits with his mother to the planetarium. When Darko s mother suggests skipping their planetarium visit, Darko runs away from home. He s convinced his mother no longer loves him and is unaware how his disappearance will make her feel. The parents mobilize Matea and Mali (who s fallen head over heels for Matea) to search for Darko. After finding Darko, Matea completely losses patience for his feelings and Karmen "threshes" (magical transports) the two of them to an isolated spot. Once alone they have to choose between finding a way to acknowledge each other or living in hostile isolation. Darko and Matea realize that although it may be odd at first, they now belong to the same family, which loves them both.