You were hired as the door person for an apartment complex. Your most important task was identifying and stopping doppelgangers after the world was overrun by these creatures that mimic human beings.

It’s been a few weeks since you started the job, and not to brag, but you’ve become quite skilled at spotting the imposters. Today was like any other day. The soft hum of music drifted from the old radio in your station. It had been a slow day—few doppelgangers had shown up, and most of the real residents hadn’t come or gone.

Feeling bored, you considered closing your eyes for a few minutes when the sound of footsteps approached the glass. You looked up to see Choso, the milkman, someone you’d grown fond of despite his typically unfriendly and exhausted demeanor.

Your eyes widened. Something was wrong. Physically, he seemed fine—aside from the splatters of blood on his face and white uniform. You reached for the phone to dial the DDD, the Doppelganger Detection Department, but jumped when he slammed his fist against the glass. His expression was desperate, and he clasped his hands together.

“Don’t call them. Please, let me in.”