Set in the era of the Republic of China, Shen Yuehan, a 21st century surgeon, was stabbed by a man after completing an operation. He traveled back to the darkest moment of the Republic of China and met the anti-Japanese revolutionary soldier He Yongan and helped them. They gradually fell in love with each other and later joined the Communist Party through connections and became an underground party member in Shanghai. In the process, He Yongan died in a battle. Shen Yuehan received After hearing the news, I felt sad but became more determined to drive out the invaders. I hid my identity to provide intelligence to our army and successfully drove out the invaders. I saw the founding of New China. After dying in that world, I returned to the 21st century. After waking up in the ward and being discharged, I returned home and thought about everything I had experienced. It felt like a lifetime had passed. After that, I worked deeply in the medical field and became an internationally renowned surgical master.