This is an automatically translated description

The early twentieth century in Tokyo is a time of real prosperity, and Aoi, a young, ambitious journalist, is happy to be living in such wonderful times. But when a wave of mysterious murders sweeps through the city, she takes it as a challenge. She has to expose the culprit at any cost.

While searching for clues, Aoi notices an old friend she hasn't seen in years. This is not surprising, because Shutaru is dead and should be in his grave, not walking around the city.

Aoi has no idea that Shutaru has become a vampire and belongs to a government unit that actually knows what is happening in the city and what dark forces are trying to take over Tokyo.