It’s about how one person can go from the very bottom and come out on top as a completely different person.
Derek knows the breakdown of his family is his fault and the only way to fix it is to become a better person. Instead, it only adds further pain and suffering.
I expected it to end with none of the humans turning out to be ailen after all. I thought that maybe there was aliens, but they were messing with the people of the town to make them push the blame on eachother.