Everyday life in a large urban hospital is like an endless marathon. From being called out and rushing out of the emergency room at any time, to tedious ward rounds and complicated doctor-patient disputes, a group of all kinds of medical staff are swimming in pressure and crisis. The attending doctor Song Yidi chose to become a doctor due to family pressure, the head nurse Zhou Nannan was reborn in pain, the surgical intern Lin Siyuan grew up in the collision between ideal and reality, the emergency doctor Deng Chengyi hides painful redemption in his humor, the executive Jia Wei protects the front line in the game, and the rehabilitation therapist Ning Jing comforts the injured with gentleness. The four volumes are intertwined with multiple threads, including the passionate fight of the medical team to save the crisis, as well as trivial struggles in the workplace, as well as the mutual ties and breakthroughs of family, friendship, and love. In the end, everyone finds their own spiritual peace in the complicated world.