With the Beauty Killer Gretchen Lowell back behind bars‚ Archie Sheridan -- a Portland police detective and nearly one of her victims -- can finally rest a little easier. Meanwhile‚ the city is in crisis. Heavy rains have flooded the Willamette River‚ drowning several people in the quickly rising waters. Or that's what they thought‚ until the medical examiner discovers that several of the victims were poisoned.