What Gets the Blood Going

After being shot, John Watson is honourably discharged and forced to return to London. Upon his return, he finds that he is missing something in his life: the excitement. He decides to take a buddy's advice and become a blood donor for vampires in hopes that it will help. When he is rejected because of the shrapnel in his shoulder, which "taints" his blood, he decides to just make the best of the night. He isn't expecting for any vampire to take an interest in him. Especially not one as interesting as Jim Moriarty.