In the wake of a political scandal that shatters her high-flying career, journalist Dolly Fontaine seeks refuge at her childhood home, Genevrier, where her mysterious mother, celebrated seventies film star, Gloria Fontaine, lived for decades. When Dolly discovers a dusty box of cassette tapes in the attic revealing Gloria's most compelling, real-life role-a daring undercover mission as a British spy to her birth country of Lusenka-so begins a perilous journey involving diamonds, Cold War intrigue, and a merciless dictator. Can Gloria's voice recordings, and an enigmatic, retired spook once known as Sunstar, help Dolly uncover the truth before a deadly adversary silences her forever?

Oh, Sugar spans two generations, taking the reader from 21st-century Cornwall to a fictional West African dictatorship at the height of the 1970s oil crisis.