Lin Yang, a factory assembly-line worker with no parents, is an easygoing soul who gets by however he can. Every day, he follows the same routine between the factory and his rented room, living on instant noodles and takeout. His biggest thing to look forward to is getting off work and gaming with his friends.
An unexpected transformation knocks his life completely off course. He wakes up to find his short hair has grown long, and his familiar body has become that of a girl around sixteen or seventeen. The unfamiliar face in the mirror shatters the peace of his life overnight.
His ID card becomes a dangerous liability, and a regular job is out of the question. Going by the name Lin Tang, he hides behind a hat and mask, scraping by with day jobs and keeping out of sight while sharing an old house with three roommates.
Zhao Yu, a thoughtful quality-control worker, is the first to uncover the truth. Zhang Lei, a straightforward and loyal delivery driver, finds out next, and Zhou Kai, a slick but helpful rental agent, joins them last. None of them presses him about the bizarre reason behind it all. Instead, the three men clumsily but earnestly cover for him, find him work, and keep trouble at bay.
From hiding in the bathroom, afraid to leave, to taking under-the-table jobs despite the strange looks; from narrowly escaping one identity crisis after another to slowly accepting his new self, Lin Tang never gets the miracle of turning back. But in that cramped rented house, he finds three family members who aren't related to him by blood.
This vast industrial city, where migrant workers lead their ordinary lives, is big enough to make room for countless people like them. Yet it is also small enough for four young people huddled together for warmth to finally find a place where they belong.
