Duniya par "Britannia" naam ke ek takatwar samrajya ka kabza hai. Japan ko harakar uska naam "Area 11" rakh diya gaya hai. Kahani ka hero, Lelouch Lamperouge, ek chalaak aur genius student hai, jo asal mein Britannia ka ek tyaga hua rajkumar hai. Wo apne desh aur apni behen ke liye is samrajya ko jad se mitaana chahta hai.
Geass ki Takat
Ek din Lelouch ko ek rahasyamayi ladki, C.C., se ek anokhi shakti milti hai jise "Geass" kehte hain. Is shakti se wo kisi ki bhi aankhon mein dekh kar use koi bhi hukum de sakta hai, aur wo shaks chah kar bhi mana nahi kar sakta.
Lelouch ek naqab pehen kar "Zero" banta hai aur ek bagawat (rebellion) shuru karta hai.
Kahani ki Khoobiyan
Dimag ki Jung: Yeh kahani shatranj (chess) ki tarah hai. Lelouch apni buddhi se badi-badi senaon ko hara deta hai.
Dosti vs Farz: Lelouch ka sabse achha dost, Suzaku, Britannia ki sena mein hai. Dono ek hi maksad (shanti) chahte hain, lekin unke raste bilkul alag hain.
Sahi aur Galat ka Farq: Kahani mein koi bhi puri tarah "hero" ya "villain" nahi hai. Har koi apne nazariye se sahi kaam kar raha hai.
Sabse Bada Twist (The Ending)
Is anime ka anth itna prabhavshali hai ki aap dhang reh jayenge. Lelouch ek aisa plan banata hai jise "Zero Requiem" kehte hain. Wo puri duniya ka nafrat ka paatra (villain) ban jata hai taaki duniya ki saari nafrat us par khatam ho jaye aur uske baad ek naya, pur-sukoon daur shuru ho sake.