During an excursion to the planet Skykar, D'Argo decides he no longer wants to travel on Moya, but become a harvester of Tannot root like all the drone-like inhabitants of the planet. While on the planet trying to convince D'Argo to return, Rygel ingests large quantities of the root, which causes all of his bodily fluids to become deadly explosives. As Pilot and Aeryn try to cure Rygel before he inflicts irreparable damage on Moya, Crichton works to free both D'Argo and Zhaan from the effects of the Tannot root before the Skykarian leader enslaves them all and takes over Moya.