Blood of an Inhuman Hitman (Rewrite)

In need of a synopsis.

Quick rundown, however, would be that this contains supernatural creatures, assassins and a boy who was turned into a vampire.

P.s. I'm aware that this is full of cliches and that may not be everyone's cup of tea, but it's definitely my kind. So, please, I'm really begging here, don't tell me that it's full of cliches, I A L R E A D Y know.