Buck cannot believe his eyes when he sees his 20th century girlfriend Jennifer (Anne Lockhart) alive on present day Earth. Buck follows the young girl, but she continues to give him the slip until he catches her in the resort town of City-on-the-Sea. The stranger, named Lela, reveals that it is no coincidence that she looks like Buck's long-lost girl friend: her appearance has been purposedly altered by an alien named Reeve (Paul Koslo) so that she could serve as a lure. With Buck now a captive, Reeve demands that the human stop a shipment of arms to a planet his people have plans to conquer.
An announcement on a public-address system can be heard in this episode paging "Captain Christopher Pike," a character from the original Star Trek.