A man who had been living as a lingerie thief suddenly undergoes a complete transformation one day. The master key he obtained allowed him access to his victims' homes, becoming the key to understanding their daily routines. But after a certain incident, he evolves from a mere underwear thief into something entirely new. The brutal scenes of victims attacked in their own homes spread a new kind of terror. This fear continues to lurk in the corners of the city, threatening lives once again today.