The young girl Wang Xiaomin, who was trapped in the quagmire of domestic violence, was rescued by the bicycle bell of the young man Li Zhijun on the night of desperate escape. Two souls abandoned by their loved ones depend on each other under the dilapidated roof. His thin back was her only paradise, and her clear eyes were the glimmer of light in his dark night. Faced with poverty, rumors and the heaviness of life, they used the warmth of dependence to resist the coldness of the world. They jointly guarded the hope of studying in the midst of suffering, and also guarded each other's scarred hearts. This is a touching story of mutual redemption on the edge of the abyss and the strongest bond growing out of despair.