The tranquility of Tokyo is shattered when a serial killer begins targeting police officers. Conan Edogawa, the brilliant detective trapped in a child’s body, finds himself in the middle of a high-stakes conspiracy. The tension escalates dramatically during a lavish reception at a hotel, where Conan, Ran Mouri, and their friends are enjoying the evening. Amidst a power blackout, a gunman opens fire in the restroom, fatally wounding Inspector Ninzaburo Shirato. Ran happens to witness the murder, a terrifying trauma that triggers a severe psychogenic amnesia. Staring directly into the killer's eyes leaves her mind fractured, reducing her memory to a terrifying blank slate.Realizing that Ran holds the key to identifying the murderer—who might be a corrupt cop within the Tokyo Metropolitan
Police Department—Conan becomes fiercely protective. The killer, desperate to eliminate the sole eyewitness, launches a series of terrifying attacks against Ran, who remains dangerously vulnerable. As Kogoro Mouri investigates off-duty and Professor Agasa aids from the sidelines, Conan takes it upon himself to guard Ran's every move, racing against time to restore her lost memories before the assassin strikes again.The investigation leads the group to Tropical Land, the very
amusement park where Shinichi Kudo was originally poisoned and shrunk by the Black Organization. Conan hopes that retracing Ran's steps in this nostalgic yet ominous setting might shock her subconscious and unlock her repressed recollections. However, the killer anticipates this move. A tense game of cat-and-mouse ensues across the sprawling park, culminating in a breathless, action-packed showdown inside the park's iconic roller coaster and mirror maze.Trapped in a hail of gunfire, Conan uses his high-tech gadgets and unmatched intellect to outmaneuver the assailant. During the chaos, a near-death experience triggers a flood of emotional memories in Ran. She recalls the fateful night at the fountain in Tropical Land, remembering Shinichi’s earnest confession that he loves her more than anyone else in the world. With her memory fully restored, Ran recognizes the culprit: Inspector Tomoaki Itakura's killer is actually psychiatrist Dr. Kazuki Kyogoku, who has been manipulating the force. With Ran's regained clarity, Conan delivers the final, decisive blow, incapacitating the villain and ensuring justice is served.