Juan, a political activist from the 1960s, arrives on Tabarca, a Mediterranean island, with Simone, a fellow activist and friend. He is trying to escape both the police and his comrades, who consider him a traitor for having killed Casanovas, a double agent whose true nature only he knows. Once on the island, Juan adapts to a closed, provincial world, becoming entangled in a web of intrigue, jealousy, and revenge.