Black Mirror: Bander
A young programmer makes a fantasy novel into a game. Soon, reality and virtual world are mixed and start to create confusion.
When his daughter goes missing in an apparent alien abduction, Gabriel's search takes him dangerously close to her strange group of so-called friends. But the further he goes inside their computer game and fantasy-obsessed world, the more he realises that he must confront his own difficult memories if he is to get his daughter back.