A medical instrument kit from the year 2450 is transported back in time and falls into the possession of old Dr. Full, a retired physician and drunkard who had been expelled from the medical association for milking patients. The futuristic instruments are awe-inspiring and virtually operate themselves. The discovery of the black bag restores Dr. Full's self-worth and dedication to healing.

A street-wise woman, Angie, realizes the value of the medical instruments and their origin. She forces Dr. Full to accept her as a partner. The two of them soon establish a successful medical practice. When Dr. Full decides to donate the instrument kit to the College of Surgeons, Angie murders him.

While demonstrating the safety of the medical bag to a patient, Angie plunges the futuristic surgical scalpel into her own neck, confident it will do no harm. Meanwhile, authorities in the future learn that the medical bag is missing and deactivate it just prior to Angie's demonstration. She slits her own throat. By the time the police arrive, the contents of the black bag had already rusted and are decomposing.