Zeta

Five former Spanish spies are murdered simultaneously in embassies around the world, all linked to the secret Operation Swamp in Colombia 35 years ago. A sixth agent, the sole survivor, becomes the target for CNI's top operative Zeta, who races to find him. Meanwhile, Colombian agent Alfa, with deeper knowledge of Ciénaga, pursues the same lead. As Zeta and Alfa delve deeper, they evade threats and unearth long-buried state secrets, culminating in the revelation of a seventh shadowy agent, code-named CASSIEL, whose hidden role drives the killings.