Frida, the pirate mouse, and Paul, the water dragon, are best friends. But one day, Paul gets out of bed on the wrong side. As he trudges grumpily to school, he kicks a stone that knocks over a mouse tent. When Frida asks him to set it up again, the argument escalates, and Paul pushes Frida over. The determined Frida stops Paul and shows him how to deal with his anger: you vent it, but never at others. After Paul apologizes to Frida, the day takes a turn for the better. Anger: an important topic in the family and at kindergarten.