She likes to have things in order, but now it seems time has come to make some order in her own life.
She has a mother, a father, and a sister. And she has a half-sister, her father’s daughter from out of wedlock.
She knows close to nothing about her. She does not even know whether she is her half-sister at all.
Her mother knows a bit more, for she has spoken to her mother about “that”.
Her sister knows something, but she does not want to talk about it. So she wants to find out the truth, and see what the truth brings: to her mother, father, sister, half-sister, and her.