Otje and irritable father Tos live in the attic of the almost bankrupt hotel The Koperwiek where Tos works as a cook. Otje is a boyish girl who love the outdoors. She has a secret tree house and is friends with Betsy cat, Bailey the dog and all the birds in the forest. Tos is quite skeptical of these friendships and believes none of Otje's conversations with animals. When Tos get fired again, because of his hotheadedness, they've got a problem. Tos has no diploma's whatsoever (he lost them all at some point in The Kompjoeter building). Tos and Otje set out into the world to find new work and an adventures begins.