When Ping sees Hanno in the zoo, he is excited, but also unhappy. Hanno is a magnificent African gorilla, big and black and much stronger than a man. But how can this wonderful wild animal live in a cage, behind bars and locked doors? Then Hanno escapes from the zoo. And a few days later his footprints are seen near Green Knowe, the old house deep in the English countryside where Ping is spending his holiday ...
1. We meet Hanno
2. We meet Ping
3. Green Knowe
4. Where is Hanno?
5. Hanno in danger
6. Hanno decides
7. Goodbye to Hanno