Spain in the 1990s is beset by a simmering campaign of terror from Basque separatists ETA, with periodic atrocities shattering an illusory calm. Against this backdrop, retired British Secret Service member Tomás Nevinson - now living a quiet life in his hometown Madrid - is approached by his sinister former handler, Bertram Tupra, with an offer to bring him back in from the cold, for one last assignment. His mission: to go back undercover, in a small Spanish town, to find out which of three women who moved there a decade ago is in fact an ETA terrorist, on loan from the IRA, now on the run and living there incognito. Charting a world where right and wrong, and good and evil, are irreparably blurred, Javier Marías takes us on a journey of rare and unforgettable suspense in this, the final novel written before his untimely death in 2022.