Conan gets pulled into a case that separates him from Haibara right when the stakes feel personal. London's fog and those sinister figures create real tension instead of the usual procedural rhythm. A Detective Conan fan watching this knows exactly what's being tested: whether Conan can solve a mystery when the people he cares about aren't there to anchor him to the case.
Conan and his friends jet off to London on what seems like a straightforward school trip, but things spiral into chaos the moment they arrive. A mysterious group of suspicious figures begins tailing the detective and his crew through the streets of the British capital, forcing Conan to figure out who they are and what they want before the situation escalates. Meanwhile, back home, Ai Haibara finds herself spending the day with Ayumi, unaware of the danger brewing across the ocean. As Conan navigates London's landmarks while staying one step ahead of his pursuers, he realizes this encounter is far from random. Someone has orchestrated this meeting, and the stakes involve more than just a school trip. The tension builds between genuine sightseeing moments and unexpected danger, keeping everyone guessing about what these mysterious strangers really want. Conan must use every trick in his detective's handbook to uncover the truth before his enemies make their move.