For every case Temperance Brennan has solved, there remain innumerable unidentified bodies in her lab. Information on some of these is available online, where amateur sleuths sometimes take a stab at solving cases. One day, Tempe gets a call from Hazel ?Lucky? Strike, a web sleuth who believes she?s successfully connected a body in Tempe?s lab to a missing persons report. Tempe looks into the case, returning to the spot where the bones were originally found. What seems at first to be an isolated tragedy takes on a more sinister cast as Tempe uncovers two more sets of bones nearby.?When she learns that the area is s a viewing point for a famous unexplained light phenomenon with significance for a local cult, Tempe?s suspicious turn to murder by ritual sacrifice...