Zhou Tiesheng, once a celebrated bridge engineering expert, has been burdened by guilt and psychological trauma ever since the Tonghe River Bridge collapsed ten years ago. Even after discovering that the disaster was caused by material fraud, he continues to blame himself for failing to properly oversee the project and eventually retreats from public life to run a repair shop. Lin Xiaoman, an engineer from the provincial capital, visits him for help, hoping he will build a bridge for Qingshan Village, whose residents struggle to travel. After an inner struggle, Zhou Tiesheng returns to the construction site, meticulously overseeing every detail despite his illness, online rumors, and construction challenges. With guidance from his mentor and reconciliation with the families of the victims, he finally lets go of his emotional burden. After the bridge is completed, he joins forces with young engineers to establish a rural bridge-building studio, carrying forward his original ideals and building convenient bridges for remote villages.