Medical examiner Laura Hanning has two charred corpses and no answers. Both bear a mysterious tattoo but exhibit no known cause of death. Their only connection to one another is a string of puzzling miracle cures. Her preliminary investigation points to a cult in the possession of the fabled panacea ― the substance that can cure all ills ― but that's impossible. Laura finds herself unknowingly enmeshed in an ancient conflict between the secretive...