The Radiant Spire suddenly appeared in the nation of Joseon. The nation began to utilize the Pure White Oil that bled from the spire in a variety of miraculous ways: an oil that never ceases to burn, an oil that heals all wounds, an oil that was a stronger power source than anything on the planet. However, that miracle soon became a nightmare once the Radiant Spire transformed into the Ebon Sting, turning the Pure White Oil into a malevolent demon-transforming Crimson Oil. Follow the adventures of Kim Rip, an amnesiac swordsman who tries to make sense of this now desolate world alongside the demon that dwells inside of him. Can Kim Rip solve the mysteries of the world and unlock his past memories? Each copy of The Devil Within: Satgat includes the Official Video Game Manual.