Harley knew she knew how to fight. She knew she’d trained, and she knew she’d even had experience fighting. That wasn’t a question. The question, really, was whether or not Marian was able to defend herself. If there was a possibility that they were going to get into a fight, they needed to each know what the other could do.

They went to a rooftop garden, where stone plinths and statues were set about artfully. “I have been meaning to redecorate,” she said. “We can ...