Zombies in office

This is a story about Stan. He was having a usual nice nap at work when suddenly heard a suspicious noise. When he woke up there was no one around and the door was locked. 

Help Stan to escape the office whose inhabitants are not who they used to be.
这是一个关于斯坦的故事。他有在工作中通常不错睡觉时，突然听到一个可疑的噪音。当他醒来时有四下无人，门是锁着的。

帮助斯坦逃生的居民不是他们曾经是谁的办公室。