That inadvertent glance sent shivers down my spine and made the hairs on my neck stand up. I stood still and tried not to show any reaction, but my heart was pounding intensely, and a sense of panic crept in. I made a conscious effort to stay composed.

On the fifteenth floor, the man squeezed out from behind me and walked out of the elevator. His tall, slender figure gradually disappeared as the elevator doors closed, and I never saw his face.

My room was on the twenty-third floor. When the el