At her mother’s store, Sol explains how time traveling works to Sun Jae but he apparently doesn’t really believe her. Angry at her distance, he then tells her that he would be traveling to the US soon for rehab.
In hyuk’s band has been selected for the competition but after seeing the audition clips of Sun Jae as the vocalist, the competition board decides to allow them participate on the condition that Sun Jae is their vocalist so In hyuk goes to see Sun Jae at his house, disappointed to hear that he would be traveling abroad soon for his rehab. Sun Jae also gets disappointed when his father tells him Sol had persuaded him to ensure Sun Jae traveled.
Mr Kim, Tae Seong’s father, discusses Kim Young Soo with Sol at the police station. He tells her they had actually seen a sample of blood in his place which matched the blood of the victim from the reservoir murder. He assures her Kim Young Soo is a wanted man and will be caught soon.
Meanwhile, the Im siblings are trying to avoid Sun Jae and Hyun ju. During class, Sol notices a particular girl flirting with Sun Jae. She tries to hide it but she’s jealous. Sol and Hyun ju go drinking but Hyun ju gets drunk because of Geum who is refusing her calls. At that same time, Sun Jae and his college friends enter the bar to get drinks. They are with the girl who has a crush on Sun Jae. Sun Jae is left alone momentarily with the girl and she starts flirting aggressively with him.
The lights go off to celebrate someone’s birthday and in the process,
Sol’s coins mistakenly scatters on the ground. While she’s trying to pick them up, she ends up under Sun Jae’s table and witnesses the girl flirting with him. She’s struck with shock when she ‘kisses’ him. Their companions arrive and discover her under the table after hearing her phone ring. But Sol can’t bear for them to see her face. She covers her head with a bucket and runs away. Sun Jae only realises she’s the one when Hyun ju drunkenly calls her name.
Sun Jae runs after her but she’s long gone. His friend tells her Sol is jealous but Sun Jae doesn’t believe it. He thinks she doesn’t like him but his friend says that if she didn’t like him, she wouldn’t have cried when he had shoulder problem. He has strong instincts and believes she really has feelings for him. Sun Jae says he and the girl didn’t really kiss but his friend counters against his claim due to the angle of their faces.
Meanwhile, the Im siblings are drowning themselves in alcohol due to jealousy although Geum is confused because of Hyun ju. In her frustration, Sol mistakenly kicks one of her shoe out of the balcony. When she looks down to check on it, she sees Sun Jae holding her shoe.
She goes down to retrieve it, lying that the shoe belongs to Geum. Sun Jae is more concerned with her, asking if she was the one with the trashcan on her head, who ran away from the bar but Sol denies it. Frustrated, he asks Sol if she didn’t care when he kissed that girl or if she doesn’t care that he is going abroad. Finally, he asks if she ever liked him in any of the time zones but she lies that she never did. They part, both feeling heartbroken.
In hyuk cuts his hair low in order to prove his sincerity to Sun Jae as he’s been begging him to join their band. He imagines how he’ll pity him and agree to join them but to his surprise, Sun Jae easily concedes which leaves In hyuk surprised.
At school, Sun Jae gets jealous when he sees Sol and Tae Seong together. Turns out Tae Seong only came to return her school jumpsuit. However, he had also overheard his father talking about her case when he visited him at the police station. So he used the opportunity to see Sol. He asks after her and assures her that his father would get Kim Young Soo because he was very competent. But Sol asks Tae Seong for a favor especially since she can’t directly tell him herself. She tells him that in 2023, he should tell his father that no matter what happens, he should save Sun Jae instead of her. Tae Seong, confused, asks why and she replies that she’s from the future.
Sun Jae has started practicing with the eclipse band. However, he still can’t forget Sol humming his song. He inquires from In hyuk if he really didn’t tell Sol about it but In hyuk is very sure he didn’t.
Meanwhile, Tae Seong escorts Sol home but they enter the store and see Sun Jae and Sol’s mother holding a bucket over their heads because water is leaking from the ceiling. Sun Jae gets jealous to see Tae Seong who immediately takes over from Sol’s mother. The two of them start competing and annoying each other. When Sol and the others leave for a few minutes, both of them get into a fight unaware that the ceiling light had started sparkling, threatening to catch fire. Sol and her grandmother enter in time to see the spark but the boys are still fighting. Sol has to quickly cut off the light bringing calmness to the atmosphere.
Sol’s mother asks Sun Jae and Tae Seong to stay for dinner but Geum is highly against it. However, it’s late so Sun Jae suggests Tae Seong stay at his home so he wouldn’t have to be with Sol. However, at Sun jae’s house, Tae Seong tells him he is clueless because he’s yet to understand Sol’s feelings. He tells him to stop wasting his time feeling jealous of him and says that if Sol didn’t like him, she wouldn’t ask him to protect him. Sun Jae feels odd after hearing this. Just then, Sun Jae’s plane ticket falls out of his couch when Tae Seong is trying to sleep. Turns out Sun Jae is planning to fly abroad for rehab.
He doesn’t tell anyone and just leaves for the airport alone. Sol overhears his friends discussing that Sun Jae left without informing anyone. Although, it hurts but she figures it’s for the best. Due to his sudden departure, Sun Jae isn’t able to attend the audition with in hyuk and the other Eclipse members but thanks to his song, they pass. They are so excited that they thank Sun Jae In a video.
Meanwhile, Sol heads home when she notices a truck resembling that of Kim Young Soo parked on her street. She turns to run away but collides into Sun Jae who it turns out hadn’t left after all. He had changed his mind after seeing the word time capsule on an advert board. This reminded him of their urn so he goes home and digs it up. When he sees the clock and reads Sol’s letter, everything falls into place.
The truck is just an ordinary truck. As it passes them by, Sun Jae tells Sol he knows that she likes him and he also knows he will die in the year 2023 while trying to save her. But despite that, he doesn’t care as he would be glad to give his life for her. (What a lover boy. This guy is suffering from something serious called love sickness)
Then Sun Jae finishes by telling her to give in to her feelings and stop running from him. He kisses her and the episode ends.
The epilogue shows the future still frozen. The news broadcasting Sun Jae’s death turns into the news broadcasting the release of Eclipse new album except this time, it’s a three member group without Sun Jae. (Why do I feel bad about this?)
