Another Halloween was here. People dressed up in unusual cloaks to be somebody else. The intentions were to either scare, or surprise others. Imagine if they were to wear these cloaks and masks, and they turned into those monsters before our eyes. And when they try to come back to their original form, the transition becomes harder. So hard, that even if they come back, they are permanently mutated.
On the grand scale, the world seems to be having a never-ending Halloween night where monsters keep raising their heads, and people willingly or unwillingly cannot come back to their original form.