When a young girl is found dead in the mountains outside Timber Creek, lifelong resident Officer Mattie Cobb and her partner, K-9 police dog Robo, are assigned to the case that has rocked the small Colorado town. With the help of Cole Walker, a local veterinarian and single father, Mattie and Robo must track down the truth before it claims another victim. But the more Mattie investigates, the more she realizes how many secrets her town holds. And the key may be Cole's daughter, who knows more than she's saying.

In North Devon, where the rivers Taw and Torridge converge and run into the sea, Detective Matthew Venn stands outside the church as his father's funeral takes place. The day Matthew turned his back on the strict evangelical community in which he grew up, he lost his family, too. Now he's back, not just to mourn his father at a distance but to take charge of his first major case in the Two Rivers region, a complex place not quite as idyllic as tourists suppose.

Melissa Craig is absolutely delighted with her new life in an old crumbling cottage, spending her days pruning the primroses and getting to know Binkie, the ginger cat next door. She only wishes she had made the move to the countryside sooner. But when a knock at the door brings news of a shocking discovery, she suddenly finds herself thrown in to the middle of a baffling mystery: the bones of a young woman have been found in the woods just behind her new home. Perhaps the little village of Upper Bembury is not as idyllic as it first seemed? Strange phone calls in the night convince Melissa that the police are barking up completely the wrong tree, so she can’t resist doing a little digging of her own. From the bingo hall to the beauty salon and beyond, her search ruffles a few feathers and uncovers many of the village’s most scandalous secrets, but gets her no closer to finding the culprit.

After their last deployment, when she got shot, her fiancé, Martinez, got killed, and his bomb-sniffing dog, Elvis, got depressed, soldier Mercy Carr and Elvis were both sent home, her late lover’s last words ringing in her ears: “Take care of my partner.” On the Fourth of July weekend, when all of Northshire celebrates with fun and frolic and fireworks, the dog alerts to explosives and they find a squalling baby abandoned near a shallow grave filled with what appear to be human bones. 

Ryder Creed and his dogs have been making national headlines after intercepting several major drug stashes being smuggled through Atlanta's airport. But their newfound celebrity has also garnered some unwanted attention. When Creed and one of his dogs are called in to search a commercial fishing vessel, they discover a secret compartment. But the Colombian cartels' latest shipment isn't drugs.