During the National Day holiday, Song Qinghuan boards the same high-speed train as the five people closest to her. Left without a seat, abandoned, and made the butt of their jokes, she repeatedly swallows her grievances in silence. Until she discovers that even the house her grandmother left her has been given away to her adopted younger sister. At last, she understands that there's no need to keep squeezing into a carriage that has no room for her. She earns a place in a top-secret national project and transfers alone to a faraway destination, undergoing four years of closed-door training. Four years later, those who abandoned her come begging for her to turn back, but she has already stepped onto a stage of her own. The farthest destination of all is finally choosing herself.