Some family trees have very rotten roots... Tea shop owner Mabel McCoy thought solving one murder would be enough excitement for a lifetime. She was wrong. When human remains are discovered beneath Grimm Island's beloved heritage magnolia tree during the town's biggest celebration of the year, Mabel finds herself once again partnered with the Silver Sleuths—her band of amateur detective octogenarians who are far more dangerous than they appear. The victim? Victoria Ashworth, the island's most prominent genealogist, whose research into founding families has unearthed secrets someone was willing to kill for. As Mabel digs deeper into the island's genteel facade, she discovers that blue blood and old money can hide the darkest sins. Between dodging another killer, navigating her complicated feelings for the mysterious Sheriff Dash Beckett, and trying to keep Bea from "borrowing" evidence (and making her famous sidecars during stakeouts), Mabel has her hands full. Especially when the murderer decides the nosy tea shop owner has learned far too much about which skeletons belong in which family closets. In a town where your bloodline determines your worth and the past is never really past, Mabel is about to learn that on Grimm Island, family secrets are worth dying for—and killing for.