In the waning days of the powerful Korean Kingdom of Goguryeo, a solitary figure wreaked havoc across the land with a previously unknown form of martial arts known as Sa Shin Mu. Following his mysterious demise, it was murmured that his younger brother - the only one to truly master the technique - had been his killer. Yet, just as quickly as Sa Shin Mu had appeared, so too did it vanish, leaving no trace of the warrior or the art.
Fast forward two decades after the kingdom's collapse, and rumors abound of a long-lost manuscript documenting the secrets of Sa Shin Mu. With this legendary martial art potentially poised to shape the course of this present age, will history repeat itself once more?
