London, 1703. Sir Barnaby Mayne has devoted his life to filling his cabinets with rare stones, bones, books, and artifacts he has amassed, although for Cecily Kay, it is a passion for plants that brings her to the Mayne house. The only puzzle she expects to encounter is how to locate the specimens she needs within Sir Barnaby's crowded cabinets. But in this new series by the creator of the Li Du mysteries, when her host is stabbed to death, Cecily finds the confession of the supposed killer unconvincing. To discover the truth, Cecily must enter the world of the collectors, a realm where a brilliant, obsessive, remorseless killer is waiting for her.