Mason walked into his South Melbourne office building still reeling from his encounter with Lisa. He crossed the marble-floored lobby heading for the elevator that went to his office, barely paying attention to his surroundings.

“Excuse me!” a voice called out through the quiet space. “Excuse me, sir, you can’t go in there.”

Mason stopped and turned, looking for whoever it was that was trying to subvert his security. The only people in the lobby were himself and the ...