Zhixia, an orphan girl in a fishing village, sets out to sea to haul in her nets and accidentally captures an injured merman. During the rescue process, the merman's blue blood forms a karmic bond with Xiaoya, awakening a hidden golden fish-scale mark on her wrist. The mark bursts with a faint light, triggering a strange phenomenon, and a mysterious merman in the deep sea senses the resonance, gently breathing life into the unconscious Zhixia. A revived Zhixia recognizes Azhan, whom she has yearned for, and the two embrace in a destined union, the beautiful scene filled with ties drawing the first season's story to a close.