Hoseok calls Jimin to leave the lodge. Jimin takes a look at the mess they had left behind and starts walking outside. As he walks, Jimin realizes that the beach was the same one they had visited when in school. He calls out to Jungkook to share his discovery but Jungkook was already sprinting ahead. He thinks that Jungkook has grown up from the boy who used to lag behind and look up to others. He reaches the intersection- left will take him to the train station and right towards his house. Jimin realizes he has to confront his parents someday and own up to his lies and fears. He sees Yoongi exit for the left and turns right. Hoseok calls for him, but Jimin tells him that he is going home now.
Taehyung says, “ Hyung, is that all, aren’t you hiding something from us?” . He glares at Seokjin and is about to press him harder when Namjoon stops him. Taehyung asks Namjoon to stop cutting in when he wasn’t even his real brother. He recalls Namjoon’s conversation that he had overheard earlier about his brother being only a year younger. Seokin apologizes and asks Taehyung to stop. Taehyung, still angry asks him to openly confess all of the secrets he was still hiding.Namjoon tries to take Taehyung outside to talk, but Taehyung pushes him , taking out his anger on him and telling him he had no right. Namjoon, shocked , lets go of Taehyung’s hand. At this moment Taehyung feels like the chain between them broke somehow. Embittered, he remarks on the uselessness of caring about each other, that ultimately everyone is alone at the end. Seokin hits Taehyung.
Jin is in disbelief that his plan worked and that the 7 finally were together, laughing and cracking silly jokes. His joy is dampened by the fact that he had something to confess. A few days earlier, Taehyung had asked him if he knew what Taehyung’s dreams meant. Jin had lied by refusing to admit that his dreams were real. He had wished to protect Taehyung from the reality that he had actually killed his father in multiple timelines. Jin gathers up courage and tries to confess to others about what he did in high school but Taehyung cuts him. With anger and resentment Taehyung exposes Jin’s act of ratting out to the Principal on him and Yoongi, and blames Jin for being the reason Yoongi got expelled. Namjoon tries to stop Taehyung. Jin mutters, “I am sorry” before Taehyung starts speaking again.
Jungkook is at the beach with his Hyungs. After helping Jimin escape from the hospital, they had made an unplanned visit to the same beach they had visited in their school days. A strong wind blows, causing Jungkook to cry because of the sand getting into his eyes. They all goof off and chase each other around. Namjoon comments on how it is just like the hot summer day they visited earlier and someone asks the date, to which Jungkook replies instantly that it was May 12. He remembered because he looked at the photo of the beach visit often. Jungkook feels a rush of gratefulness thinking back on the day, and how he had felt that he had found a real family that day. He spots Taehyung sitting by himself and asks him why he is sitting alone. Taehyung instead points to the observatory and asks Jungkook if it was there the day they had visited. Jungkook answers that it wasn’t, and if it had they would have played on it. Seokjin comes up from behind and says, “Let’s go.”
The 7 of them ditch school to go to the beach. Jungkook feels his emotions rise up on seeing the ocean. They decide to walk towards the rock on the beach, 3.5 km away. The myth was that if people stood up on the rock and shouted their dream while facing the sea, it would come true. Yoongi is reluctant to go but Taehyung starts walking ahead.Jungkook recalls an earlier day when he had asked the others about their dreams. He wonders why if none of them had any dream as such, were they walking so far in the heat towards this rock. As they walk, Jungkook gets scolded by Yoongi for the marks on his fingers. Yoongi tries to keep up a conversation by asking for Jungkook’s dream. Jungkook instead asks the meaning of a dream. Yoongi and Jungkook bond over this conversation. Jungkook looks at the marks on his fingers and remembers all the times he cut himself with a knife. Jungkook mentions how cutting himself helped him feel more awake, especially when he felt hollow. The 7 of them reach a place with a lot of pebbles scattered around, wondering where the rock had gone. They give up searching further, and later find out that the rock had been obliterated because a high end-resort was going to be constructed at the beach. The rock would have obstructed the view from the first and second floor. They look around to find yellow bands and excavator machines, signifying development. They try to cheer each other up by saying positive things like the rock wasn’t real anyway, but all of them are disappointed. Jungkook sees Yoongi trying to bite his nails, and shouts to stop him, but the drilling noise in the background interferes. As the drilling noise continues, Jungkook asks Yoongi, "Do you want to give up on this world too?”. They shout at each other but can't hear. Taking light of this situation all 7 of them scream their dreams into the sea, competing with the drilling noise. The noise ends abruptly, leaving them in silence, with Jin’s “Please!” being heard loud and clearly. They decide to commemorate the day by taking a photo against the beach. Jungkook asks Jin for the photo, and Jin hands him over by scribbling the date on the back. Seokjin assures Jungkook that the dream he yelled out will come true.Jungkook asks him if he knows what it is, but only gets a tap on his shoulder as they walk ahead.