Twin sisters Lin Jianqing and Lin Jianyue were separated since childhood and grew up in different families. They have very different personalities and do not know each other's existence. An ancestral suet-fat jade safety buckle with slight cracks. It is split in two and is the only link between two people's identities. Who is the real "stand-in"? When the fates of two people intertwine, are they fighting for each other's glorious life, or the supposedly complete self that was taken away by fate?