The golden years just turned deadly.

When Tippy Chambers sweet-talks Myrtle into volunteering for what she assumes is a harmless preschool program, Myrtle discovers she's been bamboozled into helping with a 1950s-themed party at Greener Pastures Retirement Home instead. But the sock hop takes a deadly turn when the party coordinator is found murdered, and suddenly Myrtle's friend Carolyn—who runs the mobile library program—becomes the prime suspect.

With residents doing the twist in poodle skirts and saddle shoes while police investigate a crime scene decorated with paper records and streamers, Myrtle must navigate the complex social dynamics of retirement home life to uncover the truth. Was Carolyn really trying to expose wrongdoing, or is there more to her story than meets the eye?

As Myrtle and Miles dig deeper into the victim's activities and the residents' secrets, she discovers that some volunteer work can be far more dangerous than she ever imagined—especially when someone is willing to kill to keep their crimes hidden.