Right after my divorce, my father told me to change all my bank PINs—and that same night, my ex-husband and his mistress blew nearly a million dollars, until a single message stopped them cold.

Whitmore arrived at my office wearing sunglasses, despite a gray and wet Manhattan sky. My receptionist, Grace, called me before he reached the elevator.

“Emily,” she said carefully, “Mr. Whitmore is downstairs. He says it’s urgent.”

I stood beside the window of my thirty-second-floor office and watched rain draw silver lines down the glass.

“Tell security continue reading …