On the eve of graduation, Wang Yangming, who was committed to reversing heart failure, had a disagreement with his mentor on medical experiments, so he resolutely decided to switch from scientific research to clinical practice, and successfully joined the emergency department of Ruiren Hospital, which ranks first in the country in cardiovascular disease. The busy life in the emergency department aroused Wang Yangming's competitive instinct. He took risks to deal with ventricular fibrillation of the elderly, rescued migrant workers with heat stroke, and treated patients with cerebral stroke. He continued to improve his medical skills, and formed the "Four Emergency Heroes" who shared weal and woe with Fatty Louis, Zu Wenda and Liu Fei. The four witnessed each other's growth and changes, gained friendship and love, and experienced separation and reunion, but what remained unchanged was: wherever there were the most critically ill patients, they would appear there. When Wang Yangming faced the most difficult heart patients in his medical career, the four heroes reunited, fought difficulties together, and finally succeeded.