During Napoleon's victorious campaign in Germany, the city of Kolberg gets isolated from the retreating Prussian forces. The population of Kolberg refuses to capitulate and organizes the resistance against the French army, which immediately submits the city to massive bombardments.

Granny Jantzen lives with her three granddaughters Dick, Dalli and Angela on the small pony farm Immenhof in Northern Germany. Since the breeding of ponies isn′t profitable anymore, Granny Jantzen is struggling to keep the family property. During the summer break , young Ethelbert is spending his holiday with his cousins at Immenhof. W...