Wrangel marched into the unfortified city of Elsinore with an army of 3000 men. 12-year-old Henrik lives in Skyttestræde, with his mother, Anna, and three small brothers and sisters. Anna has a grocery stall beside their house. They are about to face the life and death threat of a Swedish occupation as the soldiers ravage the country. The beautiful castle, Kronborg, is defended by 250 brave men, among them is Soren Hansen, Henrik’s father. Henrik has a good friend, Erik, and together they go on an assignment for Anna, to fetch fresh supplies for the stall from Henrik’s grandmother who lives along the coast in the small village of Espergærde. It turns out to be an exciting trip leading them on to another mission: taking a very important letter to the Danish King Frederik III. The letter is a top-secret document from the commander of Kronborg. Time is running out for Kronborg Castle, and for Denmark. Who will win the battle of Kronborg?