Here comes a Lovecraftian horror the likes of which the crew of the Enterprise has never seen before! Christine Chapel is itching for a real adventure. So, when an opportunity to reunite with her old scientist friend Jinare for research on the planet Poilant crops up, Chapel is excited to finally do what Starfleet does best: explore strange new worlds. However, when the Enterprise arrives in Poilant's space, the crew cannot make contact with Jinare or any of her researchers. Chapel, Una, Spock, La'An, and Scotty beam down, and they are greeted by nothing no one and no signs of what caused their disappearance, only a robot named D6 who urges them to descend into the planet's depths in search of his friends. But there's more than scientists lurking in the watery abyss. Ancient life-forms and behemoths await-and they might mean more adventure than even Chapel can handle.