A mysterious letter brings Conan and his friends to a mansion full of beautiful clocks that aren't quite behaving themselves. As Conan attempts to figure out what's wrong with the timepieces and who wrote the letter, he uncovers a tale of treasure, thieves, and a family tree with very twisted branches. Plus, a famous actor's wife meets with an unfortunate accident right in front of Conan, who takes on the mission to find out about her sudden demise.

Story and art by Gosho Aoyama.