Marla Case, an elite Olympic-bound athlete, finds her devotion to competition fading and chooses to step away. She considers becoming a medical responder and learns about the profession from a paramedic friend. Before committing to the rescue service, Marla accompanies her mother on an academic tour that ends abruptly when a massive earthquake strikes. The athlete reacts to save victims with her physical skills and newly acquired understanding of some emergency medical actions. She becomes a beacon of hope for the citizens of St. Louis, Missouri. However, personal tragedy affects Marla, as well, and she struggles to find catharsis herself.

Black Swan Shock is the second book in Vettori's Black Swan trilogy, although each of the three books can be enjoyed independently.

The first novel, Black Swan Impact, is a sci-fi political thriller that takes place in 2113. Having recovered from the devastation of World War III and reaching new scientific advancements, people believe only prosperity lies ahead until an emerging deadly pandemic threatens all of humanity. Dr. Syia (Sī-yuh) Case, National Institutes of Health Director of Epidemiology, is invited to advise US President Daniel Piper and the White House Crisis Action Team to try to mitigate the threat. Actions required to protect US citizens from the lethal virus become increasingly challenging. However, when Piper steers the country toward questionable courses, Dr. Case and the strident voices on the task force find there is more than a virulent virus to fight.

Black Swan Terror will round out the series.