A robot named Clara is being used for various testing and experiments in a laboratory. At some point her circuitry shorts-out, which results in her no longer following the orders of the scientist. She eventually takes control of the facility and traps the experimenters; subjecting them to the same actions they did to her. This leads to the death of all of them. The illustration featured in the PV-less upload is not Clara, it is an original character by Otsumami on Pixiv.