Cussler's novels almost always begin with a chapter taking place in the past. These contain none of the novel's main characters and often seem disconnected from the plot until the main characters discover a mystery or secret connecting the events in the first chapter to the rest of the story. This almost always comes in the form of a long-lost artifact that holds the key to the villain's or hero's objectives. Often in the first chapter, a ship or plane carrying a top-secret, important, or dangerous cargo is lost and never found, until it is recovered by a modern character later in the book.