Six years after an insane one-night stand with a hunky SEAL while serving in the military in Germany, Dr. Siobhan Monahan is back in Seattle raising the daughter they conceived that night. When she accidentally overhears her emergency room patients speaking about a planned attack on her city, she's on alert and scared for herself, her daughter and the people of the city. Her first instinct is to get her daughter to safety and then call an old friend...