You like everyone else has an imaginary friend. It is normal for people of your age. One day everyone grows up, and leaves that friend behind. Yours doesn't leave. It creeps like a shadow along the wall. It won't leave.
You're a brand new zookeeper at The Halfling Zoo- a place where half-animals live in captivity. Your job is simple- feed them and study them. Your main worry is that one of the more dangerous halflings might kill you.
Unfortunately, that may become the least of your worries.