While looking for suitable stargates to harvest for their new Intergalactic Bridge, the team comes across a small village with a revered leader. To their surprise the village's leader, Lucius (Richard Kind), has an obnoxious manner and an utter lack of credibility. On Lucious' request, Weir (Torri Higginson) sends Dr. Beckett (Paul McGillion) to determine if any of Lucious' potions are worthy of trade. Though at first put off by Lucius, Beckett soon becomes so enamored by his host he disobeys security protocol and brings him to Atlantis. By the time Sheppard (Joe Flanigan) and McKay (David Hewlett) return from another stargate harvesting mission, they find the entire base has fallen for Lucius' unctuous charm. Believing foul play is at work, McKay discovers that Lucius is using some sort of pheromone to enchant those around him. It becomes clear that unless Sheppard can remove the now entrenched and protected Lucius from Atlantis, there will be no stopping his charming coup d'etat.