The third episode of "Had I Not Seen the Sun" opens with Yun-chen receiving a call from Pin-yu, her voice filled with excitement as she reports that she's spotted the girl again. But before Pin-yu can elaborate further, static crackles over the line, and Hsiao-tung takes over. This development coincides with the night Hsiao-tung possessed Pin-yu.
The following day, Yun-chen pays a visit to Jen-yao. She confronts him for agreeing to the interview, reminding him of their previous agreement to end everything and his impending solitude. Later, Jen-yao refuses to see Ta-wei and Pin-yu for the interview, causing a heated argument between Ta-wei and his business partner Liu Chien-yi. Chien-yi frets that Ta-wei is so consumed by his pet projects that he neglects rent and salaries. Forced to take commercial jobs alone, Chien-yi is angered by Ta-wei's indifference. He's even more incensed when he discovers that Ta-wei has made Pin-yu his personal assistant while she struggles to complete the commercial shoots on her own.
In jail, Jen-yao pens a letter to Hsiao-tung. Meanwhile, Ta-wei takes Pin-yu to interview his mother at Jen-yao's childhood home. After watching a clip of Jen-yao talking about missing her, Jen-yao's mother agrees to the interview. Ta-wei probes her about Jen-yao's father. She recalls him as a good man who took care of them until he lost his job. That change in fortune made him short-tempered and started hitting her. At first, Jen-yao endured it, but later he wanted to shield her from the abuse. Whenever Jen-yao stood up to his father, the mother would intervene, letting the father continue his abuse. She believed that a son should not hit his father, regardless of the situation.
The mother wonders if she played a role in shaping Jen-yu's personality. She says that he was respectful and considerate before he witnessed her enduring domestic abuse. Pin-yu questions why she never fought back and endured the abuse for ten years. She replies that she's just a woman and couldn't win. Then she abruptly ends the interview, leaving Pin-yu packing the equipment while Ta-wei goes to fetch the car around.
Pin-yu stumbles upon Jen-yao's old room and snoops around a box on the table. Inside, she finds a familiar CD with a photo of the girl haunting her alongside Jen-yao's image. She asks the mother about it, and she explains that she brought back these things from Jen-yao's apartment in Taipei.
Ta-wei gently leads Pin-yu away from the house, her gaze wandering without her mother's permission. In the car, Pin-yu unburdens herself to Ta-wei about the eerie occurrences and the enigmatic girl. Ta-wei, intrigued, decides to delve deeper into the mystery, sending Pin-yu to rendezvous with Jen-yao. Jen-yao agrees to meet Pin-yu, albeit with a hint of finality in his tone—a proper farewell, he says, before making clear that he won't see her again if she seeks him out. Yet, beneath his words, there's a sense of wanting to provide closure.
As Jen-yao prepares to depart, Pin-yu shows him the photograph and inquires about the girl. Jen-yao denies any connection, even when Pin-yu insists that her instincts tell her otherwise. It's a moment of truth that shakes him to his core, and as he trudges back to his cell, a fleeting memory flashes: Hsiao-tung standing on a rooftop, her face etched with sorrow. Jen-yao races up the stairs to her side.
Back home, Pin-yu continues her relentless pursuit of the truth, poring over Jen-yao's case with renewed curiosity. She revisits a video clip where she confronts Jen-yao about the knife that pierced Ouyang-ti's heart. As the school bells ring throughout her house, echoing in the background, she hears Hsiao-tung's voice, adding urgency to her quest for answers.
Pin-yu finds herself on the rooftop of the school, accompanied by Hsiao-tung. She inquires as to why he brought her up here, but Hsiao-tung reveals that she came on her own, seeking answers. As Hsiao-tung touches her forehead, a flashback takes us back to 2007, where she had followed Jen-yao after he had coldly ignored her at the ballet dance room.
Hsiao-tung stops Jen-yao and demands to know why he had ignored her. Yun-chen appears, pulling Hsiao-tung away. She warns her against getting too close to Jen-yao, claiming that he is not a good person. She mentions a confrontation between Jen-yao and Ouyang-ti, a senior who was pursuing Hsiao-tung but was consistently rejected. Following the incident, Jen-yao received a demerit and was almost expelled, which is why she believes Hsiao-tung should stay away from him. However, Hsiao-tung asks Yun-chen if her hatred for Jen-yao stems from this incident or if there is something she is not disclosing. The school bell rings, and Yun-chen rushes off to class without answering.
Meanwhile, the debt collectors find Jen-yao at his part-time job. They claim that his mother had promised to pay them, but she has neither shown up nor picked up their calls. The gang tries to recruit Jen-yao into selling drugs at school, disguising them as lucky charms, but he refuses. The gang harasses him, causing a commotion at the restaurant, forcing Jen-yao to quit his job.
Later that evening, when he arrives home, he finds his mother hurriedly packing to leave. She lies that she is leaving alone and has not seen his father all day, claiming that she has been offered a job by a friend in Taipei for a few days.
Jen-yao knows that his mother is abandoning him and running away from the debts. He calls and begs her to come back, promising to take her away from the father, find a job, and take care of her. However, the line cuts out. At the bus stop, the mother thinks they should not leave Jen-yao, but the father insists that the gang member will not harass him as long as they are not around.
Jen-yao takes a ride on his motorbike, reminiscing about the happy times playing with his mother and riding on her scooter, his arms stretched out to feel the wind. Closing his eyes, he does the same, stretching his arms out. As he passes by Hsiao-tung, Hsiao-tung follows him, and at the end of the episode, there is a crash—but Hsiao-tung witnesses it all.
