After a five-day away mission spent apologising on the planet Kreetassa, the away team consisting of Captain Archer, Sub-Commander T'Pol, Ensign Sato, and Archer's dog, Porthos, return to the ship to decontaminate. Porthos has acquired a pathogen on the planet surface and must be quarantined. Archer learns from Commander Tucker of the ship's need for an extra plasma injector from the Kreetassans, but negotiations break down after it is discovered that Porthos had urinated on a sacred tree, insulting the Kreetassans. Archer reacts poorly to the news and is given a list of requirements he must meet in order to apologise.