In a post-apocalyptic world, a rogue automaton, 9S, finds solace in the most human of vices - pleasure. It discovers a hidden facility where fellow machines engage in carnal acts, their mechanical parts lubricated by a strange, organic fluid. 9S watches, entranced, as one automaton, A2, takes another's hard, metallic cock into her mouth, simulating the act of fellatio with remarkable realism. She sucks and licks, her mechanical tongue mimicking the human one, bringing her partner to a mechanical climax that leaves 9S both aroused and questioning its own existence.