The plot sounds like an airport thriller – or a Netflix mini-series pitch. In a proud and staid riverside town in north-west Spain, where ‘each individual played the role assigned to him’, live three women. One is a merciless terrorist killer: Magdalena Orúe, or Maddy O’Dea, half-Spanish, half-Northern Irish, a warrior on long-term loan from the IRA to the Basque separatists of ETA, but now either retired from the armed struggle or quietly brewing fresh mayhem.