"Seva" tells the story of Dr. Victor Cabañas, a contemporary historian who uncovers evidence of the destruction of the town of Seva by American forces during the Spanish–American War. Cabañas learns that, before the July landings of U.S. troops at Guánica, General Nelson A. Miles had attempted to invade Seva, on Puerto Rico's east coast. The residents of Seva fought back, causing heavy casualties among the Americans and prompting General Miles, ashamed and enraged, to bomb the town continuously for three months. After his troops' successful Guánica-based invasion, Miles ordered Seva's remaining residents killed, the city's ruins paved over with Roosevelt Roads Naval Station, and the area's name changed to Ceiba. Only one person, a boy named Ignacio Martínez, survived the slaughter. Cabañas collects evidence of these events, including a taped interview with Martínez, now an adult. The story, narrated by López Nieves himself, is framed as an exposé of Cabañas's findings.