Jing Xuan, a third-year polytechnic student, lives between constant fights between her parents and rejection of her classmates, who call her "lonely fish". Only Kora, popular at school, supports her. One day, she has a brief encounter with Yi Kai.

Jingxuan faces the loss of her parents after accident and wakes up feeling guilty and alone. Amidst school rejection and painful memories, her aunt and new friends support her, teaching her to accept pain, find strength and value those around her.

Jing Xuan hears strange noises after putting on her mother's necklace. At the hospital, she introduces Yi Kai to Kora, who is shocked. She then hears a woman crying in the bathroom, but Kora doesn't hear anything, which scares her deeply.

Jing Xuan meets Yi Kai's father, Tim, and seeing his loving and caring treatment of his son, she feels a deep paternal love. Jing Xuan and Yi Kai feel more secure in their feelings, thus consolidating their connection and affection.

Jing Xuan returns home, a familiar melody rekindles memories. Later, she visits the accident site with Kora, but her heartbreak prevents her from approaching. Suddenly, a mysterious man appears and leaves a bouquet of flowers, leaving her intrigued.

Jing Xuan confronts Tim, suspecting that he planned the accident, with a photo and tape as evidence. Tim denies any involvement. Jing Xuan, confused, doubts whether she should believe him or continue her suspicions.