I was alone for a few minutes in Room B. I turned off my notifications, opened my notebook, and drew a section of the plaza. Curves like waves, benches like coastlines, a central tree to anchor time. That's when I felt the tingling. Not on my skin. In the air.

Someone was watching.

I turned around. There was no one there. But the reflection in the glass door showed a fragment of a shadow retreating.

"Pablo?" I called.

No answer. I put my notebook away. I went out into the hallway. Nothing. A sound of footsteps on the service staircase. Too light for boots. Too short for an executive.

"Everything okay?" Eva peeked out from an office.

"Yes," I lied. "I thought I heard something."

"Come on. Claudia wants us to review the timeline of what happened in the park."

I went in and forced myself to leave my uneasiness at the door.

***

Rereading the timeline was painful, but it gave us clues. The exact time. The route. The position of the sun. Witnesses who weren't witnesses because no one looks