The novel is set during World War I and centers on the dramatic events surrounding the Zeebrugge Raid, which took place on April 23, 1918. This naval operation was a significant Allied attempt to block the German fleet's access to the English Channel by attacking the German-held port of Zeebrugge in Belgium.The story follows a group of characters involved in or affected by the raid. The narrative provides a detailed and action-packed account of the raid, including the planning, execution, and aftermath of the operation. It highlights the bravery and challenges faced by those participating in the raid, as well as the broader strategic importance of the operation.Westerman's novel combines historical detail with fictional elements to create an engaging and dramatic portrayal of the Zeebrugge Raid. The characters' experiences and the intense action of the raid are central to the plot, offering readers a vivid depiction of this important military event.