Darken: Before the Dark

Darken is a realm of endless rooms where its citizens live in peaceful harmony under the watchful eye of Mother Darken, their altruistic overseer. Those in Darken are survivors of trauma and have been brought into this world to forget everything and everyone they knew from their painful previous life in our world. But what happens when people start remembering? What happens when someone sees themselves as more powerful than Mother? Will Darken be divided? (Source : The TVDB)