Twin sisters were separated in two places, but reunited five years later because of a mysterious email.
The mystery of the mysterious death of his parents comes to light, and the mysterious email reveals the long-hidden truth.
They met their childhood playmates again, but they both knew that things had changed. The plane trees in their memories and the hidden feelings of boys and girls.
What is the connection between the destruction of the two families and the leaders behind the scenes? What is his purpose? What do the mysterious marks on boys and girls mean?
What connects their fates again?