Nikki travels to Mexico to attend the funeral of Luisa, a former intern at the Lyell Centre who was murdered in a carjacking in her native country. Nikki soon stumbles across the post mortem report and realises that the body is not Luisa's. There's been some kind of mistake - or is this something more sinister?Assisted by Dr Eva Vasquez and fired up with the idea that Luisa might still be alive, Nikki and Jack trace her last known movements and are led to a farm where a cartel massacre was carried out, where they start to perform makeshift post-mortem examinations.By now, Nikki and Jack are gaining the wrong kind of attention. And when Nikki goes missing, Jack is forced to make decisions that will end in life or death…