A young programmer makes a novel of DE fantasy in a game for a big company. Trying to keep his mind in good doing, his own reality becomes strangely disoriented. Young programmer Stefan Butler (Fionn Whitehead) who adapts a fantasy novel in a video game in 1984. The film is based on a planned Imagine Software video game of the same name that was not released after the company went bankrupt. A piece of horror and science fiction, Bandersnatch incorporates meta-commentary to free will.