Ace: Private Eye (or the Case of the Golden Osprey -- Part Seven)

It was cold and raining outside the Lewtes building, where my client's father once had his office. I had a hunch that the professor was meeting someone here -- why else would he drop by at midnight?

All I could see through the window were two dark figures. That's when one of them pulled a weapon.

I didn't have a choice. I made for the nearest entrance, and ducked inside. Lightening flashed in the hallway as a peculiar sight greeted me...

A pile of cleaning supplies and a janitor's uniform.