Construction engineer Du Fei completed the Africa Bridge project and rushed back to the hospital. The old man said Angkor's smile repeatedly while his grandfather Du Yuxing died. At this time, Du Fei accepted the invitation of the Construction Engineering Group to go to Cambodia to participate in the construction of Highway A of the Oriental Construction Engineering City. In Cambodia, he had a beautiful encounter with Cambodian girl Fangcao, a female teacher of a water elementary school, and started a beautiful and romantic pure love story. In the end, the two who had gone through ups and downs finally came together under the gaze of Angkor's smile.

When Seventeen was two, his father abandoned him at a hotel and died that same night. The boy was taken in by a wealthy couple from Beijing who raised him in luxury; until, years later, police reunited him with his birth mother. Forced to leave the only home he knew, Seventeen struggles to adapt to rural poverty and a controlling mother traumatized by loss. Though she loves him deeply, her fear of losing him again becomes suffocating, even preventing him from taking his high school entrance exam. Meanwhile, his former adoptive parents return to the village and adopt another child, whose privileged life becomes a painful reminder of what Seventeen lost. Torn between gratitude and longing, Seventeen dreams of escaping back to the city through education but must first find the strength to reclaim his future.