Directed by Brandon Cronenberg, Antiviral follows Syd March (Caleb Landry Jones), an emploee of the Lucas Clinic, a company which purchases viruses and other pathogens from celebrities who fall ill, in order to inject them into clients who desire a connection with celebrities.
In particular, the pathogens supplied by the Lucas Clinic’s exclusive celebrity Hannah Geist (Sarah Gadon) are extremely popular, and another employee at the clinic, Derek Lessing (Reid Morgan), is responsible for harvesting them from Hannah directly.
Syd needs to make extra money so decides to use his own body as an incubator and sets about stealing pathogens from the lab, with the hope he can sell them on the black market.
In order for his plan to succeed Syd acquires a stolen console that enables him to break the copy protection placed on the virus by the clinic; once injected in a client, the pathogen is rendered incommunicable. Syd then passes the pathogens to Arvid (Joe Pingue), who works at Astral Bodies, a celebrity meat market where meat is grown from the cells of celebrities for consumption.
As the film progresses, Derek is caught smuggling and arrested, Lucas asks Syd to take his place and harvest a pathogen from Hannah, who has recently fallen ill. Once he has taken a blood sample from Hannah, Syd quickly injects himself with some of her blood and this opens Syd up to a whole new world of experiemces…