The place is U-chronia, a hazy world that lives in hazy memories of the distant past.
OU, a young boy, wakes up in a dried up riverbed without any memories of his own. He meets Zarry, an opossum with a flaming tail, who guides him on a journey to find out his story.
Just like a Michael Ende book, "OU" disguises itself as something else - an adventure game - to meet and interact with reality.
OU is also a challenge - a challenge to games as a whole.