Baron Baltzar Casimir Von Gahl - after an earlier adventure commonly known as "Baron Olson" - owns an old farm, but has huge debts.

The story takes its beginning in 1518 , the Danish King Christian II has taken Sweden. Sten Sture the younger appeal to all loyal subjects to resist. The offer reaches the farmer Mats Waltersson in Dalarna , Sweden's heart and he gathers his men. Dalmas were going from house to house, they do not want a Dane on the throne. At Brännkyrka outside Stockholm is a battle between the Danes and Swedes. Swedes win and the Swedish riksbaneret out during the Battle of Gustav Eriksson Vasa.

It's the beginning of the 1800s. A feud between the people of Ödemo and Rävgården has been going on since the dawn of time and now it's worse than ever.

Three boys steal a sailboat and sail away for a summer adventure on Lake Mälaren.