Chen Ke, a college student returning home for summer break, wants to avoid socializing with people she'd rather not deal with. She goes back alone to the house she left behind in childhood, planning to coast through the vacation. The village has changed beyond recognition, though much of it still looks as it once did, and there are even more unfamiliar faces. One day, she digs up a childhood treasure in her own courtyard: a jade bracelet she has never seen before. It takes her to an unfamiliar future. Just like that, she becomes the future version of herself.
War and natural disasters have ushered the planet into a new era, the Abyssal Dawn. And yes, the future has discovered more planets. The familiar people and things are gone. With nothing to her name, how will she find her way home?
It's as if she's survived in another world, living under another identity. Unlike the peaceful time she came from, this place is rife with interstellar conflict. But so what? She had already been avoiding home because of her responsibilities, so how could she simply settle into this new life? As she lives on in this world as “herself,” she discovers all sorts of new things and keeps going to school and having fun. She even takes pride in it, thinking there's no reason she has to go back if she can keep living this way. But then she discovers how the wounds inflicted by war have endured into the future. She still thinks she'd be better off returning to her peaceful era, and, too timid to risk her life, she searches for a way home so she can escape.
She was never meant to stay long on this journey to the future. All right, she's just afraid of dying. She's leaving. She's going home.