Brown's Steve Rogers is first shown sketching a portrait of a Mrs. Shaw (Susan French), who complains to him about a gang of muggers who have been stealing the proceeds from cashed Social Security checks; she denies having cashed hers. He bids her do this in order to set a trap for the muggers, and springs the trap as Captain America. In the meantime, a free-lance revolutionary terrorist calling himself General Miguel (Christopher Lee), planning to fight an unspecified war, kidnaps a Professor Ian Ilson (Christopher Cary) and forces him to resume his research in manipulative gerontology. Ilson has managed to formulate both a chemical that accelerates aging and the antidote to the same chemical, and Miguel, posing as the warden of a prison in Oregon near Portland, plans to use the chemicals in question to hold Portland hostage for a multi-million-dollar ransom. Ultimately Brown's Captain America and Lee's General Miguel directly clash face-to-face, and when Miguel throws a glass bottle of the aging accelerant into the air, hoping it will shatter against Captain America's body, the Captain throws his shield into the air, where it shatters the bottle in such a manner that the aging accelerant splashes Miguel instead, aging him to death in less than a minute.