The team heads to Nicaragua, and Susan, after introducing the ghost hunters to her extended family, leads the way. She and Robb check out the Beast Tower in Coyotepe Fortress, where Satanists have been known to perform rituals. They both feel strange sensations and pursue a mysterious noise with the feeling that they're being toyed with. As Joe and Barry investigate the site of an exorcism, they hear footsteps and call on Scott and Paul for backup, who report that one of their cameras has gone out. Revisiting the Beast Tower, Scotty and Joe hear a "Hey," and hope to catch it in analysis.

Their next stop is Leon, at the museum of Carcel XXI, a onetime facility where criminals were held and political prisoners were hideously tortured. Many of the employees have quit due to the high level of paranormal activity.