At a university in California, Zoe McConnell (Olivia Wilde) and her lover and collaborator Frank Walton (Mark Duplass) are working on a resurrection project. Recorded by the newcomer Ava's camera, they and team members Clay and Nick are about to usher in a milestone moment for the project. After many hardships, their experiment was finally successful, and a long-dead dog was successfully resurrected. But at this moment, the content of their research was known to the school and the funding company, and all the hard research results and data over the years were taken away by the sponsor. Unwilling to fail, Zoe and Frank and others took advantage of the night to break into the laboratory again, but an accident occurred during the period, and Zoe was unfortunately electrocuted to death. Frank, who was extremely sad, failed to rescue him, and he suddenly came up with the idea of injecting serum with undetermined side effects into Zoe's body...