Spy pic Zeta follows a Spanish CNI agent, Zeta, who is tasked with tracking down a former spy who participated in an undercover mission 35 years before, with a Colombian spook, Alfa, also trying to find him. The other five participants are murdered at the same time at different embassies around the world, and as Zeta and Alfa advance in their investigations, they unearth secrets that have been hidden for decades including the existence of a shadowy spy who may hold the answers to everything.