Based on a true story from the fateful day of August 29, 1943, when the Germans disarmed the Danish army and navy. The minesweeper MS 1 plays the leading role in the film about the ship that refused to surrender. The commander, Captain U.H. Gad, camouflaged the boat as a tugboat under the name 'Sorte Shara'. With Sweden as its destination, the boat set sail and experienced hours of excitement as it approached the German observation posts.

Ebbe Langberg
as Chefen

Ove Sprogøe
as Tom

Søren Elung Jensen
as Kok

Carl Ottosen
as Bøder

Henning Palner
as Skæg

Bent Thalmay
as Peter

Ole Wisborg
as Næstkommanderende

Jørgen Buckhøj
as Neptun

Jørgen Krogh
as

Ole Ishøy
as