Rhena's father tells a story about Atlas, a forest entity that whispers stories of the dead to its trees. That same night he disappears into this forest. Rhena does everything she can to get her father back.
Wow, what a puzzling short, ghost! I watched it from the embeded video in your post.
This short is atmospheric and folklorish. In order to follow it or understand, I have to ponder the clues and the consequence.
Possible spoiler
Spoiler:
I think I am following the idea of the consequence of Rhena's decision, and I think she understands it too. But I wonder if anyone has an interpretation of why she does what she does at the very end. Or maybe I just have to listen to the words in the wind.