Craig wore a light windbreaker as he made his way from the L toward the aikido studio to work out. For the third day in a row, he was hoping to catch the mysterious woman he had seen the week before. He wasn’t sure why, but her assault on what appeared to be a random person on the street—and what happened in its aftermath—had stoked an intense curiosity. Craig had felt compelled to follow his instinct then, and he felt that urge again. Who was she? And what was it about her that he felt the need to understand? Lauren was still in Minneapolis, and aside from a few brief conversations, they hadn’t spoken at length since their strained parting. It was midmorning and chilly. As Craig neared the studio, he remembered that Lauren agreed to meet him and Danny for dinner Friday night, so he need

