A terrorist group invades a laboratory containing a deadly bacteria and destroys the lab with an explosion. They later announce via the internet they have gained possession of the bacteria and declare themselves to be the Red Siamese Cats, a terrorist group that was eradicated a decade ago.

A new member from the Black Organization that shrunk Shinichi’s body manages to find out about Shinichi’s transformation into Conan. This discovery starts to put those around him in danger as Gin and the other Black Organization members start to take action.

The Isle of Koumi, a beautiful island in the Pacific Ocean. On the island, people pass an old legend down from generation to generation that there was the Seabed Palace, an ancient ruin at the bottom of the sea, where the treasure of 2 female pirates, Anne Bonnie & Mary Reed (who really existed 300 years ago), was left. When Conan and his friends visit Koumi Island while on vacation, they meet some treasure hunters. There was something suspicious about them.

Synopsis Kogoro and Conan came to Yokohama according to a request from a mysterious man. But that was a trap of this man. Ran and the Detective Boys will be taken as hostages. If they don’t solve the request of the man within 12 hours, the bombs attached to the hostages will explode. Furthermore, the man know that Conan`s true identity is Kudo Shinichi. Also Hattori Heiji, the High School Detective of the West, and Kaito Kid enter the stage. Will they be able to solve the mystery within the time limit and save Ran and the others? And who in the world is the client?