Cursed

My name is Mac Brennan and that's the only thing I can remember about myself. Not why I woke up in a dumpster. Not why my right arm is as black as pitch and covered in glowing red tattoos, and certainly not why a vicious death cult is after me.
Actually, that last part isn't true. I know why the death cult is after me. It's because I saved that damned girl from them. I didn't know who she was at the time, but I'd have done it anyway. I just don't like it when girls get beat up, call me old fashioned. Still, I can tell she's hiding something behind those devilish eyes, and if I want to find out what it is, I'll have to help her.
My name is Mac Brennan. I have no memory, and I'm a werewolf-hunting, hellfire-flinging version of Faust himself.