The Hephaestus Mission reaches its 500th day since launch, and Eiffel is determined to make the most of the occasion. His celebration is cut short, however, when a power outage knocks out Hera and all of the station’s automated systems. The crew must find a way to get the station’s central processor back online, and Eiffel stumbles onto a new mystery in the process. Plus, homemade walkie-talkies, Hammer Horror, dance cards, Stephen King FM, and barreling towards certain death.