Set in the 24th century, the series follows the adventures of the crew of the Federation starship USS Enterprise-D. In this episode, relieved of duty and facing a court martial, Dr. Crusher (Gates McFadden) tells of her support of a Ferengi scientist (Peter Slutsker) and the trouble that ensued from an applied test of his theory.

Guinan (Whoopi Goldberg) visits Dr. Crusher (Gates McFadden) in her quarters, complaining of "tennis elbow". Crusher breaks the news that she is no longer a doctor on the Enterprise and will be facing a court martial. She tells Guinan the whole story.

A Ferengi scientist, Dr. Reyga (Peter Slutsker), has created a metaphasic shielding technique, but racial profiling and his unorthodox methods have left most scientists in the field ignoring his work. Dr. Crusher decided to play the role of a "scientific diplomat" and invite other scientists versed in the field to come to the Enterprise and view a demonstration of the doctor's prototype. As they are all skeptical, they decide that someone other than the Ferengi should pilot the shuttle outfitted with the shielding. Jo'Bril (James Horan), a Takaran, volunteers.

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