Fic synopsis:

Hakuba is murdered after Conan refuses to help him with a case. While the circumstances surrounding his death seem straightforward enough, things become complicated after Conan begins to receive letters from Hakuba 45 days later. Using the clues and journals left for him, Conan must forge unexpected alliances to discover the truth behind their shared ‘Boscombe’ secrets.

Chapter 3 now on fanfiction.net and A03!