Aka：명탐정 코난: 순흑의 악몽 / 名侦探柯南：纯黑的恶梦 / Détective Conan : Le Pire cauchemar / Detektiv Conan - Der dunkelste Albtraum / 名偵探柯南：純黑的惡夢 / El detectiu Conan: El malson més negre / ยอดนักสืบจิ๋วโคนัน เดอะมูฟวี่ 20: ปริศนารัตติกาลทมิฬ / Detective Conan 20: La pesadilla negra / Meitantei Conan: Junkoku no Naitomea / أطياف ملونة / Detective Conan: The Darkest Nightmare / Detective Conan 20: La Negra Pesadilla / Thám Tử Lừng Danh Conan 20: Cơn Ác Mộng Đen Tối / Detetive Conan: O Pesadelo Sombrio / Детектив Конан 20: Худший из кошмаров
Summary：A spy infiltrated the Japanese National Police Agency, retrieving secret files of Britain's MI6, Germany's BND and America's CIA and FBI. Rei Furuya and a group of Tokyo Police PSB intercepted the spy during the getaway, and just before the major car accident, FBI Agent Shuichi Akai sniped and crashed the spy's vehicle. The next day, at the aquarium in Tokyo with the Ferris wheel, Conan and the Detective Boys found a woman with heterochromia iris who suffered memory loss and had a broken cell phone. Having decided to stay and help the woman regain her memory, Conan and the Detective Boys are under the watchful eye of Vermouth.
