On July 26, 2003, the 50th anniversary of the Moncada Army Barracks raid in Santiago de Cuba, something unexpected happens. When Fidel Pérez and his brother accidentally tumble to their deaths from their Havana balcony, the neighbors’ outcry, “Fidel has fallen,” is misinterpreted by those who hear it. The misinformation quickly ripples outward, and it reawakens the city. Three Cubans in particular are affected by the news—an elderly vagrant...