One morning, at the observation deck of the Bell Tree Tower, a man is suddenly shot dead by an unknown sniper. Conan Edogawa, who happened to be visiting as the murder occurred, rushes to apprehend the sniper but fails to do so. He later learns that the suspect for the incident, Timothy Hunter, is a former member of the Navy Special Ops squad and was already being investigated for a previous murder case. The FBI believes that there are at least three people Timothy wants dead. However, after the deaths of two of them, Timothy himself is killed, throwing the investigation into disarray.

As they lose their only lead, news about the assassinations spreads across Tokyo, leaving the city in a state of panic. It is up to Conan to find and catch the culprit in the hope of putting an end to this sniping spree terror.

[Written by MAL Rewrite]

On a dark night, the Japanese police is raided by a spy. Different countries' intelligence agencies—such as England's MI6, Germany's BND, and America's CIA—as well as the FBI's secret files are going to be taken, but public safety officers lead by Tooru Amuro arrive just in time. The spy steals a car and escapes. The spy and Amuro are then locked in a dead heat on the highway, and just as it is about to cause an accident with multiple cars, the spy's car is hit by FBI agent Shuichi Akai's rifle bullet and falls of the roadway.
The next day, Conan and his friends go to a newly-remodeled aquarium in Tokyo. Under the main attraction, a Ferris wheel, Conan finds an attractive woman alone and injured. Her left and right eyes are different colors.

But the woman is in a state of amnesia where she doesn't even remember her own name, and the cellphone she's carrying is broken. Conan and his friends promise to help her regain her memory, so they stay with her.

Throughout all this, Vermouth is watching behind the scenes. Afterwards, she pulls out a silencer and speaks into an attached intercom, "It's as planned, Gin."

A bombing case at Nichiuri TV in autumn. The Satsuki Cup, which crowns the winner of Japan's Hyakunin Isshu, is currently being filmed inside the facility. The incident results in a big commotion and, while the building is burning to ashes, the only people left inside are Heiji and Kazuha. They get rescued just in time by Conan, who rushes to the scene. Both the identity and purposes of the bomber are unknown.

While confusion takes over due to the explosion, Conan meets a mysterious beautiful girl who claims she is "Heiji's fiancée". Her name is Momiji Ooka and she is the Kyoto High School champion of the Karuta game. As fate would have it, Kazuha is going to face Momiji in the Hyakunin Isshu, so she begins to train with the help of Heiji's mother, Shizuka, who is a skilled Karuta player.

At the same time, in a Japanese house in Arashiyama, Kyoto's outskirts, the reigning Satsuki Cup champion is murdered. Pictures of the crime scene reveal Momji's presence. Additionally, several Karuta cards were spread around the victim.

Conan and Heiji, along with the Osaka and Kyoto police departments, begin their investigation on the Satsuki Cup and the related murder case. As the inquiry goes on, they come across a secret connected with the Hyakunin Isshu. 

(Source: Detective Conan Wiki)

In the film's story, there is a sudden explosion at Tokyo Summit's giant Edge of Ocean facility. The shadow of Tooru Amuro, who works for the National Police Agency Security Bureau as Zero, appears at the site. In addition, the "triple-face" character is known as Rei Furuya as a detective and Kogorou Mouri's apprentice, and he is also known as Bourbon as a Black Organization member. Kogorou is arrested as a suspect in the case of the explosion. Conan conducts an investigation to prove Kogorou's innocence, but Amuro gets in his way.

(Source: ANN)