Telemundo's popular soap opera "Más Sabe el Diablo" is the source for this gripping drama that expands upon the story and gives insight into the characters. Ángel Salvador, known as Diablo (Jencarlos Canela), leads his gang of thieves on a dangerous mission to Miami. While setting up a high-stakes casino robbery, Ángel falls in love with a secretive woman and learns an astonishing truth about his archrival, Martín Acero (Miguel Varoni).

Four Spanish ex-intelligence officers are assassinated simultaneously worldwide. The CNI discovers all participated in the covert "Operation Ciénaga" decades ago in Colombia. Zeta, the CNI's best operative, must hunt and protect the sole survivor, facing his deadliest global mission yet. Top Colombian agent Alfa will join Zeta, seemingly knowing more about "Ciénaga"'s secrets than him.