And then, just as I was starting to relax, Kasia’s expression turned serious.

I knocked again, louder this time, and waited. Still nothing.

That was weeks ago. Now, as I stood in the bustling train station, I wondered if I had made a mistake. Had I been foolish to think that I could just drop everything and travel across Europe to find someone I barely knew?

I took a deep breath and knocked on the door.

It was a nondescript five-story walk-up, with a faded awning over the entrance and a scattering of bicycles leaning against the wall. I checked the mailbox and saw that Ania’s name was listed on one of the lower apartments.

There was no answer.