This is a mythological and psychological suspense work that deeply explores the inner world of Sun Wukong. It revolves around how the suppressed inner demon of "Igen" is born, grows and tries to usurp the true body, launching a thrilling secret battle for the soul. From the nameless rage at the foot of the Five Elements Mountain, to the karmic fire residue in the Bagua Furnace, from the cruel domestication of the golden hoop spell, to the self-murder of the real and fake Monkey King, inner demons grow simultaneously on the journey of seeking scriptures, gradually stealing memories and distorting cognition. When the spiritual mountain is in sight and the moment of Buddhahood arrives, Sun Wukong faces the final decision: to be completely purified and sublime into a flawless golden body, or to bear all the darkness and scars and become an unprecedented fighting and victorious Buddha? This book uses a popular writing style to delve into the subconscious abyss of the hero and explore the price and struggle behind glory.