This is one of my favorite current mangos, it's a really cool horror/action series with a sketchy style that's getting an adaption sometime later this year. Currently we're about 70 or so chapters behind but 2 translated chapters are out weekly so now is a good time to jump in. The plot is as follows:
"Strange murders are happening in Tokyo. Due to liquid evidence at the scene, the police conclude the attacks are the results of 'eater' type ghouls. College buddies Kaneki and Hide come up with the idea that ghouls are imitating humans so that's why they haven't ever seen one. Little did they know that their theory may very well become reality."
Here's a PV for one of the later volumes that hooked me in initially, (Warning has late spoilers, view if ya don't care):
http://www.youtube.com/watch?v=4-z_rG7M3tA
Also sauce on adaption confirmation: http://www.animenewsnetwork.com/news/2014-01-25/tokyo-ghoul-anime-slated-for-tv