Toni Holmes is the best gluten-free baker in Oiltop, Kansas--okay, she's the only one--but when her grandmother becomes a murder suspect, she's more concerned with keeping Grandma free... When Toni's beloved--and eccentric--grandma Ruth is arrested for the murder of her archenemy, Lois Striker, it's time for a senior moment of truth. Telltale tracks from a scooter like the one Grandma Ruth rides lead the police to suspect the outspoken oldster, but...