In the early 20th century, people's livelihood in China was in decline. As a declining aristocrat, Jin Yurong was determined to become a doctor who saved the world and used her own hands to help more people. She met Zhao Zhengnan, the son of a large family who also cared about the people. The two met, knew each other, and then fell in love. They also tried hard to explore ways to make the world a better place. After all kinds of hardships, Yurong finally became a doctor who saved the world, and Zhao Zhengnan became a soldier with progressive ideas and guarding one side. But the torrent of the times forced them to separate, and the two eventually went their separate ways. Just when Yurong felt disillusioned with life and fell into a trough, the belief in communism shone into her world. Yurong gradually reborn, devoted herself to the revolutionary cause, and became the invisible guardian of the revolution. After going through all kinds of dangers, the lovers finally got married. Inspired by Yurong, Zhao Zhengnan eventually became a part of the red wave, joined hands to fight against Japan, and embraced a brand new China together.