In 1932, Carlos is blackballed from his town's exclusive casino over whispered rumors. In 1937, in the chaos of the Spanish Civil War, a young trumpeter named Sebastián is ordered to guard Rafael, a wounded Republican prisoner, and finds himself drawn to the enemy. In 2017, Madrid historian Alberto inherits a mysterious envelope from a grandfather he never knew, and starts pulling at a thread that leads all the way back to Federico García Lorca.