After his journey in the United States filming The Last Stand with Arnie, Kim Jee-woon returned to Korea to make another notable blockbuster that he demonstrated how to handle so well in the past.

This time it is a period espionage and counterespionage plot, in a sober and serious, almost dry tone. However, fans of the director will be reminded in style and rhythm of The Good, The Bad and The Weird, with which it shares the fantastic protagonist trio, an excellent production design and some very dynamic and spectacular action scenes, a trademark of this director.