Modern policewoman Lin Qingxia accidentally traveled to Shanghai in 1937 while performing a mission. She awakened her personal space powers and obtained an jade ring that can store items.
Taking the place of the murdered Paramount dancer Bai Meigui, she forged an identity with the help of the ballroom manager Chen Jiuye, and discovered that the original owner was actually a hidden agent of the military command.
Using a space ring to crack the Japanese military's secret transmission, he was rounded up by the Special Top Class when he was in contact with the underground party Lu Mingyuan, and narrowly escaped with the help of space powers.
His identity was exposed when he obtained the Japanese defense map of Hongkou, and he was set up to test by Sato Kenji, the chief of the special high school section. He relied on key evidence of space transfer to resolve the crisis.
While delivering the top-secret intelligence "Sakura Project", he encountered a large-scale manhunt. In order to cover the evacuation of his comrades, he took the initiative to expose himself. When he was imprisoned, he activated his ultimate space ability.
