The Listers have been part of Arborville society for generations--though seventy-something Isobel Lister doesn't fit the role of upper-crust heiress. She's always been a colorful character, and her fun-loving spirit is on display at the senior center celebration as she performs some beloved Irish songs. But just minutes later, her body is found backstage.

It's hard to imagine who'd target such a harmless eccentric, but Pamela finds herself suspecting everyone. There's the Wiccan who thought St. Patrick wasn't so saintly; the woman upset about cultural appropriation who feels the commercialization of shamrocks is a sham; the two men Isobel was seeing, who could have been green with jealousy--and old friends and family who may have feared Isobel would spill their secrets. But Pamela's on the case, and that means for the killer, the jig will soon be up . . .