"…In a situation like that Brother Yoon-Jae, I believe Su Jin waited until he was older to confront the Nian beast. He went into the office that day knowing he had changed the Grand Formation Array so if he died the Nian beast would be trapped here. But to protect his little sister and mother, he ordered the first servant to tell his mother what was happening. It wasn't a coincidence those two servants were from the Peace Lake Village, Su Jin recruited them because of their hatred for the Nian beast. If anyone would believe him, it was those who suffered from the Nian beast. But… Su Jin failed. He must have doubted his Father being the Nian beast during the crucial moment."
Yoon-Jae sat there and listen to Sol's explanation in silence.
Soon he raised his head and asked.
"How do you know all of this, and when did you figure it out? Was it back in that room before I fell asleep? You were acting strange then."
Sol nodded.