APTX 4869 Antidote was what the shrunken detective waited all along. And now that he has found it, he wonders if he really should go back to being Shinichi Kudo.
Everyone already knew Conan Edogawa. Him lost would cause him another trouble, but a part of him tells him to do it. All along… the troubles he passed to turn back to before, for the Ran who was waiting sincerely.
Witness the detective solving mysteries, and also mysteries of his own heart. Who to choose? The patiently waiting Ran or the lonely and needs someone Ai.