The two searched Sara's parents' room for a while before Ruanruan found a small locked box in the bedside table.
"Dad, look at this, whatever's inside this little box must be really important."
The box wasn't too big; Ruanruan picked it up, placed it on the bed, and then continued to look for the key.
Indeed, they found the key inside the bedside table. Upon opening the box, they found some identification documents, the house's property deeds, identity proofs, and such. However, they also discovered an old photograph.
There were four people in the photo: a couple, a young man, and a blonde girl.
That girl must be Sara, the couple her parents, but who was that young man?
"Could he be a brother or someone like that? But from what that guy said, it seemed like this man wasn't part of their lives."
"Keep looking."
Next, they went to Sara's room.
