In 1941, on the eve of the Pacific War. The world situation is turbulent, and a new round of war is about to break out. Forces from all over the world gather in Shanghai, the magical city, with undercurrents surging and crises everywhere. Through Hidemi Ozaki, a Communist Party member who was lurking in Japan's top leadership, the Chinese Communist Party obtained the Japanese army's plan to launch an attack on Pearl Harbor, codenamed "East Wind, There Will Be Rain..."