The Killer.

"Wow… This is indeed different from other places." Isaac thought aloud and turned to look at the middle-aged man, "How big is this place?"

"Big…" The middle-aged man laughed while holding his stomach, "Enormous, I think it would take me ten years to walk through the entire City!"

"I see…" Isaac wiped his sweat, "Thanks for the information."

"No problem." The middle-aged man waved his left hand and entered the house. The door closed behind him, and the lights in the living room suddenly lit up.

Isaac went straight to the door, put his hand on the door handle, and tried to open the door. Surprisingly, the door opened, and a fresh view of the brand-new house greeted him.

"Wow…" Isaac entered the house and looked at the freshly painted walls, new furniture, and clean floors.

Bam!

The door closed.

Isaac saw a bowl on top of a cabinet. It had a pair of keys, which seemed to be the key to the house and garage.