In 17th-century Latvia, as Swedish and Polish armies march across the war-torn land, the corrupt councillors of Riga stand ready to hand over the city’s keys to whichever foreign power pays the highest price. But three jolly friends — Andris, Pēteris, and Ērmanis — together with their female companions Rūta, Anna, and Lēne, refuse to surrender without a fight. Rallying the people of Riga, they rise in a courageous struggle for freedom of their city.

The 30-year war still goes on. Riga headmasters have decided to submit themselves to mercy of Polish-Lithuanian Duke. Rigas' defenders disagree strongly and steal the ceremonial Key of Riga. Will they succeed in their fight against all odds? Will three Latvian musketeers have their happily ever after?

Greve hatred of the new world is growing stronger. But explosives are stored under the rocks of Old Riga. Event coincidences becomes too threatening.