Human curiosity speaks louder than Vulcan logic. Despite T'Pol's objection, Archer sends an away team to explore an uninhabited planet before getting a full scan of its unique properties. When nightfall arrives, the away team seeks shelter from a storm in a nearby cave. Panic and anxiety strike the team when a pollen brings on hallucinations of a life-form in the cave. Tucker's preconceptions of Vulcans are intensified when his delusions convince him T'Pol, in league with the "rock people," intend to kill him and his human crew-mates.