Inspired by Sheriff David Reichert's memoir Chasing the Devil: My Twenty-Year Quest to Capture the Green River Killer, this Lifetime Movie Network mini-series details how the killer who stalked Washington State for two decades was finally captured and brought to justice. An elusive madman has the citizens of Washington State locking their doors. Just when it begins to seem as if the killer will never get caught, however, a young woman named Helen "Hel" Remus' (Amy Davidson) has a chance encounter with the Green River Killer that leaves her forever changed. Meanwhile, local Sheriff David Reichert (Tom Cavanagh) puts both his family and career on the line to see that justice is served. In a last ditch bid to save any more innocent girls from being slaughtered, Sheriff Reichert seeks the advice of notorious serial killer Ted Bundy (James Marsters), whose expertise on the topic at hand may give the frustrated lawman just the lead he needs to crack the case.