Agent Zeta

When four former Spanish intelligence officers are killed at the same time in different parts of the world, the Spanish intelligence agency CNI investigates and finds that all had been involved in a secret mission called "Operation Ciénaga" in Colombia many years ago. To uncover the truth and prevent further attacks, the agency assigns their top agent, Zeta, to protect the only surviving member connected to the operation. As Zeta pursues this dangerous case across multiple countries, he is joined by Alfa, a leading Colombian agent who appears to have more knowledge about the hidden details of "Operation Ciénaga" than Zeta does, making this mission the most challenging one of his career.