Yakumo is cursed (or blessed, depending on your view) with a red left eye, with which he can see ghosts. He keeps his headquarters in the movie research club (of which he is the sole member), and he solves cases involving ghosts -- for a fee. In the first episode, Haruka asks his assistance with a mysterious case, and with a combination of ghostly communication and simple deduction, Yakumo solves the case of the murders.
Then we get into a 'case of the week' groove -- but those episodes are quite weak. Where the series starts to shine is with the multi-episode story arcs that delve into Yakumo's past.
It turns out that there are some connections from the past between Haruka and Yakumo: their mothers knew each other. Toss in a murder that was perpetrated 15 years ago and a mysterious pair that has something to do with some of the cases that Yakumo has been investigating, and the plotting gets pretty tight. The cast expands to cover Yakumo's uncle (and adoptive father) and his mute daughter, a pair of police officers and a reporter, along with their own connections.
What I liked the most about it all is that even though the supernatural plays a part in the cases, it's mostly 'normal' detective work that solves the tangled web.
Visually, the series is not impressive. The character designs are merely okayish, the backgrounds a bit drab and often a bit dark (but I guess that last thing is to be expected from a series featuring ghosts). The voice acting is OK, but the music didn't do anything for me.
- Multi-episode story arcs feature quite good plotting;
- Gradually we learn more and more, which keeps you interested.
- "Case-of-the-week" episodes are kinda weak;
- Visually not very inspiring.
All in all, a good middle-of-the-road anime if you like detective-work with a dash of the supernatural thrown in. I'll give it a 7.