If we say the hospital is a battlefield between life and death, then the doctors and nurses work in the ambulance are the advance troops of this war. They race against death every day and deal with all the unexpected situations before the doctors in hospital taking over, and strive for more rescue time for the patient. Every day, all kinds of patients are sent to the hospital in the roaring of ambulance. The program follows 13 emergency cases to show the real first aid condition. Containing in the ambulance are not only injury and pain, but also the whole messy mix of life. People's attitude towards life and death are all concentrated in the small space of the ambulance.