Detective Conan: Back to the Past, Conan Has Nowhere Left to Run

One day in the future, the organization's current BOSS, “Negroni,” is cornered. Before dying, he blows up the place he's in, intending to take himself and everything around him with him. But by a stroke of luck, he transmigrates to the first year of Conan!

As soon as he arrives, he encounters the shrunken Shinichi Kudo and Shiho Miyano, now known as Conan Edogawa and Ai Haibara!

He then begins a secret operation, while making Conan face a crisis unlike anything he's ever experienced.

Conan discovers that this newcomer is practically a jack-of-all-trades! Then, while Conan isn't paying attention, Negroni manages to win Ai Haibara over! And Ai actually turns against him for Negroni!

Conan: “Ai Haibara! Why would you do this?”

Ai Haibara: “There's no reason! He's mine!”

After failing time and again, Conan decides to fight to the death, only to discover that Negroni has anticipated everything he could possibly think of.

Conan asks in despair, “Who are you, really?”

Negroni: “You've done very well, Conan Edogawa. No, I should call you Shinichi Kudo!”

Ai Haibara: “Kudo, give it up. You can't beat him.”

Gin: “If Negroni wants to be BOSS, I'll help him take care of everything.”

Vermouth: “Silver Bullet, I hate to admit it, but you lost spectacularly.”