Elle Silver knew there would be questions in space - she just didn't know they would be so personal and so urgent. She begins to question the use of their space-travel drug, HCH. Elle notices a growing number of her friends and fellow colonists awaken from their 90-day sleep cycles exhibiting a variety of negative side-effects and she begins to believe the drug is the culprit. Some of the effects are minor, dry eyes and lack of appetite. Other symptoms are a bigger concern on a tiny ship packed with colonists. With each sleep cycle completed, more and more colonists awaken both confused and barely concealing a simmering rage - rage that could be a catastrophe on a ship as crowded as the Vera Rubin. Elle needs proof, but she also needs a plan. If the drug that allows them to travel deep-space is at fault, what then? Elle and her friends Ashok, Achebe and Jin-Hai are pressed to their limits to find a solution to their problem before the ship erupts into chaos... with light years left to travel. This is what she trained for her whole life - but now everything feels untethered.