事実ではないことがネット上で拡散され、苦境に立たされる５号車の元乗客たち。原因不明の手の震えに苦しむ直哉（山田裕貴）や、あらぬ誹謗中傷で休職を余儀なくされた優斗（赤楚衛二）もまた、「こんな世界、もう終わればいい」と思うほどの絶望の淵にいた。
しかしその頃、物理学教授の蓮見（間宮祥太朗）は、地球環境を激変させる小惑星の衝突について、新たな事実をつかんだようで…。そんな中、５号車のメンバーが集まる対策会議に連れてこられた直哉。そこには久々に顔を合わせる紗枝（上白石萌歌）の姿もあった。そして一同は、意を決した米澤（藤原丈一郎）の発案で一本の動画を公開することに。するとその動画をきっかけに、事態は思わぬ方向へと動き出していく。
Yonezawa publie une vidéo qui commence à renverser l'opinion publique. Alors que l'astéroïde continue sa course vers la Terre, Shirahama peine à donner un sens à sa vie.
The former passengers of Car No. 5 find themselves in a difficult situation after untrue facts are spread online. Naoya (Yamada Yuki), who suffers from unexplained tremors in his hands, and Yuto (Akaso Eiji), who is forced to take a leave of absence due to unreasonable slander, are also on the brink of despair to the point where they think, ``This world should just end.'' I was there. However, around that time, physics professor Hasumi (Shotaro Mamiya) seems to have discovered new facts about asteroid collisions that will drastically change the earth's environment. Meanwhile, Naoya is brought to a countermeasures meeting where the members of Car 5 gather. Also, there is Sae (Moka Kamishiraishi), who they meet for the first time in a while. The group decides to release a video at the suggestion of Yonezawa (Fujiwara Joichiro). Then, with that video as a trigger, things start to move in an unexpected direction.
