When Nate Sefton goes missing, his brother Jeff, a tarnished reporter, goes looking for him. Jeff discovers that Nate's disappearance is tied into the underground following of a TV show, Cult
. He joins forces with a research assistant on the show, Skye Yarrow, and they soon discover that a secret group of fans may be responsible for a series of murders and abductions. Meanwhile, in the series itself, FBI Agent Kelly Collins closes in on the men who abducted her sister and nephew on the orders of cult leader Billy Grimm.