The orphan Jonna is longing for a mother. One day, an old car stops outside the orphanage and out steps a gorilla that picks Jonna for adoption. It soon becomes clear that they have more things in common than they initially thought. When they start becoming a family, Tord from the local authorities shows up and threatens to send Jonna back to the orphanage.
The forest’s police chief Gordon is about to retire and he needs to find a new assistant. Paddy, a clever mouse with a great sense of smell seems to be the right candidate. Together they have to solve Gordon’s last case – the mystery of squirrel’s missing nuts. Could it be the fox that took them? Gordon and Paddy will soon find out.