In 2019 Los Angeles, former police officer Rick Deckard is detained by Officer Gaff, who likes to make origami figures, and is brought to his former supervisor, Bryant. Deckard, whose job as a "blade runner" was to track down bioengineered humanoids known as replicants and terminally "retire" them, is informed that four replicants are on Earth illegally. Deckard begins to leave, but Bryant makes veiled threats and Deckard stays. The two watch a video of a blade runner named Holden administering the Voight-Kampff test, which is designed to distinguish replicants from humans based on their emotional responses to questions. The test subject, Leon, shoots Holden on the second question. Bryant wants Deckard to retire Leon and three other Nexus-6 replicants: Roy Batty, Zhora, and Pris.