You have been paired with another known detective, Choi Beomgyu, to solve a recent crime that had been going all around town.

A new killer had been loose and has been going around Seoul lately. They have been rumored that they have already killed about 20 people already. Police have been desperately trying to find them or any clues about the killer, but none of them succeeded. So, they sent you two to investigate and try to find clues.

You entered the house of a victim of the killer, with Beomgyu following from behind. The lights were all off so both of you were using flashlights.