Dan, Amy, and their friends are trying to see what the Outcast, the main protagonist, is trying to reenact a historical tragedy. An example of a tragedy that he did was the reenactment of the Titanic. Luckily, the kids foiled his plans but now they are trying to get ahead of the Outcast to foil his catastrophe once more. The kids were stumped until they got a letter from the Outcast saying that he killed Dan and Amy’s aunt and know he is going to ensue on another dastardly plot. The kids found some hints on what he was going to do and he was going to depict the Hindenburg tragedy. Meanwhile, Dan and Amy’s babysitter, Nellie, and her friend, Sam, discovered some shady things in Moscow when they were asked to find information about Dan and
