When I get outside the building, I still don't see Alex.

I turn desperately to the doorman. "Did you see where Mr. Grant went?"

"Just down the block, miss," he says, pointing. "Didn't tell me where he was going, though."

I don't stop to think. I just run down the street in the direction he indicated.

Even though it's getting late, there are still a lot of people out and about. I try to spot Alex on the sidewalk ahead of me, but I don't see ...