Lin Zhiyi's world collapsed on her twentieth birthday.
She is fake.
When everyone thought this was a tragedy of a dove occupying a magpie's nest,
The real daughter who returned crowned her with her own hands: "Call me sister."
And the powerful detective adopted brother behind the real daughter looked at her with eyes full of inquiry and protection.
There seems to be a deeper secret hidden behind this mismatch of fate...
When the fog cleared, they discovered that each other was the most precious gift given by fate.