Jim is the boss of a small company and is dear to Desby, who is also a member of the company. However, when he came to the real World War I in a dream one night and begged a pilot named Biggs for a forced landing, fate began to play all sorts of incredible jokes on him. Under the explanation of the mysterious old man Raymond, Jim believes that he and Biggs are brothers across time and space, and he must always be ready to sabotage the sonic weapons secretly developed by the Germans with Biggs and his comrades. In the face of Jim's strange behavior, Deiss came to London and was once brought into the era of war.