Riddles in the Dark Ep 14 - Family Drama

The two half giants' argument could be heard from three hills away. Their rumbling voices loud enough that the forest creatures ran as if from fire. The brothers were known to have disagreements but this one was especially violent in tone. In the morning both brothers were missing. Rogi returned first a week later. His brother Nogi a few days after that. They were never seen together again. The mystery: What happened and why did they never reconcile?