The series, created by David Moreno, directed by David Ulloa, and written by David Moreno, Raúl López, and Eva Saiz, is a contemporary , , and realistic spy thriller that explores the personal and professional challenges faced by a group of CNI intelligence officers in a turbulent world reminiscent of the Cold War era.

Juan Diego Botto ('Everyone Lies'), Elena Martín ('Creature'), Israel Elejalde ('The Nights of Tefía'), Elisabet Casanovas ('The Route'), Clara Segura ('The 47'), Tristán Ulloa ('The Asunta Case'), David Lorente ('Looking for Coque'), and Nacho Sánchez ('Mantícora') lead the cast.