Allie Fenske's husband was murdered at random year ago on the streets of San Francisco, and she hasn't been able to work or feel normal since then. When her son, a psychologist, pops in for a surprise visit and presents a list of activities he thinks she should try, she barks at him and he storms off in a huff. But the next day she decides to take a walk to Mission Dolores, an historic Catholic church and cemetery near her home. As she reads about its history on a bench in the garden of the Mission, a nice man stops to chat about himself and the significance of the Mission to him. When Allie gets up to leave she finds him stabbed and bleeding. This was not what she expected to happen on her first outing since her husband's death...