"When the death of a Mexican national brings Detroit PD to Leader’s doorstep, she assigns Teresa Martinez - codename Lancer - to the case. It’s a bloody mess that no one can make heads nor tails of until a second victim is discovered in Mérida, the capital of the Mexican state of Yucatán. Lancer heads to the land of the Maya and discovers that ancient history is never truly buried as long as today’s headlines are rooted in the travesties of the past."