Kepa Junkera left the stage on the 6th of December of 2018 in Ghent, Belgium. He vanished, his accordion went silent. The news mentioned a stroke, an urgent admission to hospital, a recovery process, and then nothing. The self-taught Basque artist who had elevated the trikitixa and the popular Basque music to their highest level, who had released an album almost every year during his 40-year career, disappeared without a trace.

After reading the novel “The Impostor”, Professor Unai Eguía begins an investigation to uncover what happened to Enric Moner, a Catalan republican deported to Nazi camps. At the same time, Antón Gandarias investigates his uncle Anjel Lekuona, who was captured by the Gestapo in exile. Their paths cross and their research takes them to Prague, where they discover the incredible story of František Suchý and his son, who risked their lives to preserve the ashes of 2,000 victims of Nazism.