When Detective Gordon retires and Buffy is left alone at the police station, she hears strange noises and decides to call Gordon in to help her with the mystery.

The detective lay in bed with his eyes closed. But he couldn't sleep. He was thinking. He always thought best in bed. Especially with his eyes closed. Something is going on in the forest: one of the animals is saying nasty things about the other forest creatures. But no one dares make a statement to the police. Who is the culprit? Detective Gordon and his assistant Buffy must investigate! But this is a complicated case. The two police officers split...

The final story in this big-hearted series takes on the most important case ever investigated in Detective Gordon's forest -- where is Buffy's mother? Gordon faces his old nemesis, the fox, in an investigation that leads to the edges of the forest.