Tangtang, a young ranger.
Lu Yan, a doctor with a kind heart.
Two people who were supposed to have nothing in common ran to the border because their home and country were in trouble. After experiencing war after war, the two gradually became familiar with each other and became inseparable brothers. Unfortunately, natural disasters can be avoided, but man-made disasters cannot be avoided.
The hardest thing to guess is the human heart, and the easiest thing to get hurt is the human heart.