Unthinkable

On a blustery San Francisco day, six strangers take shelter inside a popular neighborhood restaurant--never imagining they have only minutes left to live. The gunman is merciless, and the ensuing carnage is the worst the city has witnessed in decades. It is a random act of violence no one could have foreseen. Unless it wasn't random at all.... Pregnant with her first child, homicide lieutenant Jane Candiotti is under strict doctor's orders to take it easy. But when a mass shooting claims the life of her teenage nephew, all bets are off. Jane will go to any lengths to bring down the monster who did this--even enlisting the help of a dangerous ex-con. And when she uncovers a chilling connection between the shooting and a decades-old murder case, she knows she cannot stop until the final horrifying piece of the puzzle falls into place.