It is a long time since the good doctor stood in the middle of a Star Trek-novel. In this title - which took its name form an older Isaac Asimov-text - Bones is three years on assignment on board the Enterprise when he suddenly finds his Captain and his first officer going on a little side-trip while Hikaru Sulu commands the ship and he has to stay to supervise the delivery of important medical supplies.
Meanwhile the Captain and some of his crew investigate a new planet and suddenly one landing-teammember goes missing. This is especially disquieting, because the planet is also missing a lot of intelligent inhabitants.
While the two groups have their seperate adventures at their respective venues, we learn a lot about Bones' time in medical training and how he has come to StarFleet in the end. This is also the part that makes this book quite interesting which otherwise would be a bit simplicistic.