Wen Jing's life is a dust-free place carefully built for her younger brother Wen Yu.
After her parents died unexpectedly, she gave up her bright future as an architect and spent her entire life building an airtight fortress for this sensitive and fragile piano genius who suffered from bipolar disorder. She used her love to isolate him from all the storms in the world. She thought that this was her only and final atonement as a sister.
Little did he know that her suffocating "protection" and her brother's, which stemmed from trauma and extreme dependence, had already dragged each other into an abyss of eternal destruction.
He is her most perfect "work" and also her heaviest "original sin".
She is his only "nest" and the gentlest "cage" he uses to imprison each other.
When a savior from the "outside world" tried to open a window for this fortress. A hunting game in the name of family affection begins.
All resistance has become a catalyst for tragedy.
All sacrifices point to more complete destruction.
In that fire that burned everything, they finally gave each other an eternal promise in the most tragic way.
"Sister, can we not say goodbye?"
