Ana Donnelly has agreed to help her Irish grandfather, Peter, to right a wrong he committed in his youth when fighting with the International Brigades in Spain at the start of the Spanish Civil War. What starts as a simple undertaking becomes complicated when she discovers that others are intent on preventing her from fulfilling her promise. Who should Ana trust? Is Jaime, her newly found cousin, really what he seems to be? Or is his involvement more sinister? As Ana negotiates her way through complicated relationships, she finds comfort in thinking about her grandfather's story. Remembering his voice, as he explained how he met her Spanish grandmother and how their lives were shaped by his one moment of wrongdoing, strengthens Ana’s resolve to carry out her mission to the end, regardless of the dangerous consequences that follow her even when she returns home to Australia.