* * * Spoilers below * * *
05:31 - girl in the house with legs chained is Young-Joo.
1:43:45 - girl in the orphanage is Young-Joo

Seok-tae is not the real father.
Young-joo is not Hwayi's mother.
Hwayi's real mother is killed at the hospital by Seok-tae.
