In Shanghai in 1932, the sycamore leaves in the French Concession fell on the edge of gunpowder smoke. Su Wanqing, a Western medicine doctor who returned from studying abroad, opened a Huimin Clinic in order to inherit his father's legacy. However, he fell into an existential crisis because he refused to treat Japanese military officers.
At that time, Lu Jingyuan, the chief writer of the Hujiang Daily, was famous for "writing against Japanese pirates and awakening the Chinese people". However, he was hunted for a report that exposed the smuggling of arms by the Japanese army, and he hid in Su Wanqing's clinic in embarrassment. One holds a scalpel to save lives and heal the wounded, and the other holds a pen to criticize current problems. The two people, who had no intersection at all, were accidentally bound by a "Tibetan doctor".
The clinic has become an underground information transfer station. Su Wanqing's stethoscope can detect whether the patient has secret messages, and Lu Jingyuan's editorials contain the password to awaken the public. Amid the raids by the Japanese army, the informants from the traitors, and the indifference of the concession, they rescued the wounded and rescued the wounded while passing on information, from testing each other to relying on each other for life and death. When the war spread to the door of the clinic, Su Wanqing held a scalpel in front of the wounded, and Lu Jingyuan printed the editorial on a flyer and threw it on the street - love in troubled times is never about flowers before the moon, but "you are a kindhearted doctor, I protect the mountains and rivers, and we guard a tomorrow together."