Four ex-cops in a retirement paradise. Sure they’ll rest…when the killer is caught. After a long career as a police officer, Moira hopes a move to a luxury retirement community will mean she can finally leave the detective work to the youngsters and focus on a quieter life. But it turns out The Homestead is far from paradise. When she discovers the body of a young woman floating in one of the pools, surrounded by thousands of dollar bills, her crime-fighting instinct kicks back in and she joins up with fellow ex-cops—and new neighbours—Philip, Lizzie and Rick to investigate the murder. With the case officers dropping ball after ball, Moira and the gang take matters into their own hands, turning undercover homicide investigators. But the killer is desperate to destroy all the evidence and Moira, Philip, Lizzie and Rick soon find themselves getting in the way—of the murderer and the police. Just when they thought they could finally relax, they discover that someone has infiltrated their ‘safe’ community. Can they hunt down the murderer and get back to retiring in peace? And after all the excitement, will they want to?

It looks like an open-and-shut case—until one of the Retired Detectives disappears… When movie producer Cody Ziegler goes missing from The Homestead’s Millionaires’ Row, his wife, retired actress Olivia, immediately claims there’s foul play afoot. A million-dollar ransom demand soon follows, with clear instructions not to involve the cops. In desperation she enlists the help of Moira, Rick, Philip and Lizzie, aka the Retired Detectives Club. Racing against the clock, the four retirees set to work. Sure, Cody had enemies—there’s a disgruntled employee, a jilted film-maker and a hundred other people who know how much he’s worth. But when it emerges that Cody’s apparently perfect marriage isn’t what it seems, even Olivia isn’t above suspicion. When Cody’s car turns up in a nearby lake with a shocking surprise inside, the case becomes even more complicated. But with Philip and Lizzie’s marriage on the rocks, and threatening notes sending Moira into a spin, the Retired Detectives Club risks falling apart before getting any closer to the truth. Can Moira and the gang find Cody before it’s too late? Or will this case see them lose in more ways than one?

Did she jump—or was she pushed? The Retired Detectives have a theory. Now they just need the evidence… The brand-new Shimmering Sands retirement community is a beachfront paradise—until realtor Jessie Beckton plunges to her death from the penthouse suite she’s selling. When the cops rule out foul play, the Retired Detectives agree to step in. They’re certain Jessie was murdered—but how can they prove it when the apartment was locked from the inside? As the gang pursue their investigation, a host of potential suspects emerge who all have secrets to hide. But just as they seem to be closing in on a culprit, a shocking second murder sends them back to square one. Meanwhile, former CSI Lizzie’s marriage to ex-DCI Philip suffers a fateful blow. And their partners in crime-solving, Rick and Moira, find their new romance tested when a mystery woman from Rick’s past appears—with a child in tow. The team must put aside their differences and join forces with a former adversary if they’re to solve the case. But in a deadly game of cat-and-mouse, can they lure the killer into the open before one of them pays the ultimate price?