This would be my first time running a RP if this gets enough interest / plot building, so I'd like a co-GM or two to help me out, haha. And depending on who expresses interest, I'd be fine making a thread in free or casual. Y'all decide on that last point, basically. 

 [hider=Premise]The premise is a modern world, almost the same as ours. However, reincarnation is a fact of life...for the worst of the worst. In this world, those who commit vile and major crimes against humanity are reincarnated. They’re given a second chance—sometimes a third and fourth and sometimes that second chance can span multiple lives. 

These human beings are tyically called paladins. Paladins (in general) believe they’re reincarnated in order to right the wrongs of the past, and they use their power to protect others. That power manifests itself in two ways: 1) the paladin is in peak human condition. They rival Olympic gold medalists in strength, speed, and agility and they’re exceptionally healthy. You'll rarely ever find a paladin with the common cold or even cancer, for example. 2) Many paladins—though not all—have a superhuman ability in addition. This could be as simple as having super strength as opposed to peak human strength or as powerful as telekinesis.

Some, of course, choose to use that power to continue their evil. When they do so, these beings are called shades. Shades (in general) believe that they’re reincarnated not to protect humanity, but to continue punishing it. This is backed by the fact that should a shade continue his evil, he is reincarnated yet again whereas the cycle will end for paladins who do good. Paladins generally believe that this means there is a metaphysical life-after-death, and it’s reserved for those who have redeemed themselves; shades tend to be more doubtful about the afterlife and embrace life as they know it.

Extra random details...

Many paladins and shades—though mostly paladins—tend to deal with psychological issues that manifest as depression and insomnia. Typically, they learn of their past lives through dreams. However, it’s seen as strength to simply know your past, to remember it. At the other end of the spectrum of inner strength, it’s seen as a weakness to not be able to recall the past at all.

There are various bars, taverns, pubs, clubs and even cafes run by paladins found around the world. They act as hot spots for the paladin network, and a shade would be pretty stupid to show up around one. However, these vicinities are few and far between, and are typically in large cities with high crime rates. They’re also hard for even paladins to find by chance, but once you find one, you can be easily directed to another. [/hider]
So I have a pretty solid idea of what the world is like. And if you don't want to do this on a modern time line, we can take this concept and make it medieval or waaay into the future. It's pretty doable either way. But a plot would help a lot in creating a good RP. I just have no idea what to do for one.