A dim light illuminated the room. A small woman in round glasses stared at her laptop’s screen.

There was a clatter at her trash bin. Probably the rats again. Doctor Su went back to her research, adjusting her glasses.

Then a loud clatter at the trash bin. She left her seat, inching towards the window.

She opened the blinds, and there was a hand, covered in blood, on her window shield.

She shrieked and went back, reaching for her phone to call the police but then heard a voice.

“Doctor Su, it’s me, Johnson. Open the damn door!” There was a hard knock. She threw her phone down and ran...