Gideon is happy to be in Mexico with his wife—until he's asked to examine the mummified corpse of a drifter thought to be shot to death. Gideon's findings reveal that the cause of death is far more bizarre. Then he's asked to examine the skeleton of a murder victim found a year earlier—only to discover another coroner error. The Skeleton Detective knows that two "mistakenly" identified bodies are never a coincidence. But if he isn't careful, unearthing the connection between them could make him another murder statistic in Mexico.