A frantic 911 call sends the CSI team to a vacant penthouse later revealed to be filled with bobby traps and they discover a corpse that seems to be nearly 100 years old. Navigating their way throughout the house to uncover all secrets the house may hold, the team members’ lives are put in jeopardy when the traps attack them, which includes blades falling from the ceiling, floors turning and changing, and secret passageways behind pictures and walls that hold massive volumes of water that any person will drown in.