Over the ensuing weeks, Jess settled into a pattern of seeing Jonathan Summers, her hedge fund sugar daddy, twice a week. He was surprisingly loose-lipped with her about his business plans, and I began to make use of that for my own ends. My bank had wanted to facilitate one of his offerings for years, but he was loyal to a local outfit. Jess had provided me enough details that I felt increasingly confident that I could predict one of his next moves, which happened to target a client of mine. Summers might well be playing right into my hands, and if I handled it right, I could be looking...