Crown Princess Märtha and Crown Prince Olav are forced to flee when Nazi Germany launches a surprise attack on the 9th of April 1940. With Germans on their tail they have to make a decision which weighs heavily on their shoulders.
The King and Crown Prince Olav retreat to London, but Märtha finds that she isn’t safe with her Nazi-sympathetic relatives in Sweden so takes the children on a boat from Finland to the United States.
In the USA, the President extends a special invitation to Märtha and the children and showers them with attention. But when German bombs leave London in ruins, Märtha fears for Olav’s life.
Märtha is pressured to exploit her friendship with the President and begs him to help Norway, but he has promised to keep the USA out of the war. Their friendship is put at stake. Martha and the children get a surprise Christmas present.
The Cabinet puts a stop to Märtha’s efforts for Norway so she resorts to dinner table tactics. When the President intervenes, she realises that his feelings for her are deeper than friendship. Meanwhile, the first lady gives Märtha unusual lessons in public speaking.
America enters the war, and Olav arrives from England. Missy grows suspicious of ties between Roosevelt and Martha, as does Olav. Märtha promises Olav not to see the President again, but when a dastardly Nazi plot unfolds, she and the children need the President’s protection.
Roosevelt announces that he will help Norway and asks Märtha to tell him the truth about her feelings. A Nazi agent slips through the cracks, putting the children at risk. Märtha travels to England and gets a shock.
Märtha isn’t sure if she will return home after the war. Before she starts a new life, she must face one final battle. Maybe the greatest of her life.