Cinema has an obsession with exploring artificial intelligence. It's almost innate to the medium. We're talking about a history that goes all the way back to Metropolis in 1927. The trend really took off in the wake of 2001: A Space Odyssey in 1968, but the tropes of the trend were already pretty well established at that point. When you're watching a film about artificial intelligence, you're in for a story about what defines humanity, creation, and morality.
Tau is a science fiction/thriller about scientific experiments in a smart house. Julia (Maika Monroe) is kidnapped by Alex (Ed Skrein), a programmer and scientist, for experimentation. Alex's goal is to create the most advanced, adaptive artificial intelligence system ever. His current model, Tau (the voice of Gary Oldman), is tasked with protecting his mansion, overseeing the experiments, and doing everything per Alex's orders. Once Julia breaks free of her literal restraints, it's up to her to convince Tau of his own humanity to save her own life. Can a computer program ever learn to think and feel like a human? What happens if we train them to? Who gets to define humanity?