Chen Jinyue, a top history student at Beijing University, takes over a garment factory on the verge of bankruptcy. Amidst the desperate situation of factory management, she unexpectedly discovers a magical door inside the factory that connects to the parallel space-time of the Jiang State! At that time, the Jiang State is suffering from a century-old snowstorm, completely exhausted of supplies and food. Jiang Qi'an, the destitute prince, steps through the door and exchanges a peerless ancient jade for winter clothing to save the people of the Jiang State. From then on, Chen Jinyue embarks on a cross-space-time commercial path, repeatedly rescuing the Jiang State's crisis through modern supplies, and her factory scale gradually thrives along this unconventional commercial path.