Archer is fuming after the Kreetassans refuse to part with parts for Enterprise because of a diplomatic gaffe involving his dog, Porthos, who then falls ill with a mysterious disorder. But Dr. Phlox thinks there's more to Archer's rants than meets the ear.

A disturbing incident from T'Pol's past prompts her to seek Archer's help in apprehending a renegade undercover Vulcan agent wanted for smuggling biotoxins used to make weapons.