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Central to the mystery of Lars' disappearance are three sisters much like Barb, Faye, and Retta, but a few decades farther along in life. Are Betty, DeeAnne and Lydia three harmless old ladies, or are they dangerous criminals?
Of course our girls count on Sister Power to help them out, but in this case they need more than that. Aid comes in the form of a player from the Green Bay Packers, a feisty woman in her seventies, and Styx, the strong-hearted Newfoundland who'd die before he'd let anything happen to Retta.