It's been 4 years, and Buffy, Angel, and Thess have been living in relative peace as a dysfunctionally cozy family. But nothing can last forever... Tara might not be dead, but they're losing hope for her staying among the living, and strange new vampires have been sighted. To get to the bottom of these unfolding horrors, our gang will have to head underground... and face the horrifying true cause of the decline in vampire activity!