A magazine editor concocts and executes the perfect murder in the snowy hills around Tokyo only to then encounter an acquaintance. He kills him too but his streak of bad luck has only just begun.
Shintaro is trapped on a Ferris wheel with a bomb on board and if the amusement park doesn't pay the bomber until noon, it will go off. His only other hope is a young explosives expert whom Furuhata suspects is the bomber.
Furuhata is invited to visit his old school friend at his remote cabin in the woods but once he gets there he finds his friend acting strangely and denying he ever sent the invitation.
On a dark and stormy night, Chinami kills her business partner in her remote manor house in the hills. Then the doorbell rings. As luck would have it, it's none other than Inspector Furuhata seeking refuge from the rain.
A politician's secretary murders his boss and the boss' mistress staging the scene to look like a murder-suicide. However, one of his victims survives and is taken to the hospital for recovery.
While staying at a remote onsen with an ill Furuhata and Saionji, Shintaro falls in love with a mysterious woman from Tokyo. The next morning, however, she is missing from her room and all the villagers say they've never seen her.
During a long bus trip to New York, a Japanese woman sitting next to Furuhata challenges him to a game. She will tell him about the perfect murder she committed and see if he is able to figure out how she got away.
After killing a woman in a hit and run, a famous Kabuki actor decides to kill the only witness, a theatre security guard, and stage it to look like an accidental fall. Only Furuhata Ninazburo is not convinced.
Kyoko Kagami is a pen name for a pair of twin writers. After one sister kills the other, their technical advisor Furuhata investigates. His investigation is complicated by his feelings for the surviving sister.
An employee at a Japanese embassy in a South American country is kidnapped but Furuhata, who is there on holiday, begins suspecting that the man was killed by none other than the Ambassador Extraordinary and Plenipotentiary himself.