At age twelve, Xu Qinghe was abducted and escaped, being rescued by Chen Yue, a fishing village boy who spent all his tuition money to help her return home. The two set a pledge of reunion using a silver necklace carved with a moon as a token. Ten years later, Xu Qinghe returned home to repay the kindness, only to have the Zhao father and son falsely impersonate him. Following detailed clues layer by layer, she finally found Chen Yue hidden at a fish stall, uncovering the truth of why he suppressed recognition due to his father's kindness, and the long-delayed reunion of ten years was finally fulfilled.