In the vast desert, the weary warrior Munsu is saved by Mon-ryon, a hopeful youth aspiring to be a secret agent for the fallen nation of Jushin. Mon-ryon seeks to rescue his fighter girlfriend, Chunhyan, from the clutches of the malevolent Lord Byonand. Amidst this quest, Munsu faces a near-fatal encounter with desert goblins, the Sarinjas, negotiating for his life by offering Mon-ryon as a substitute meal. Despite doubts about Mon-ryon's true intentions, Munsu embarks on the mission described by the young dreamer. With the aid of spectral soldiers summoned through Angyo Onshi's powers, Munsu frees Chunhyan and earns her loyalty as his protector. Together, they vow to avenge Jushin's lost glory by confronting those responsible for its downfall.