A Principle's PA heads back to her office when she hears strange noises from the next room. On opening the door she sees a short, grey hairy 'demon' shredding paper. It turns around and pounces on her. We hear screaming, and then the windows of the building explode and the demon runs off into the cloak of Redlip, a Type 5 entity with a disfigured face. Rupert Galvin arrives at the scene, and talking on phone says "There's been a break-in at his High School. Type 3 I'd say." As he picks up a confidential school file on Luke Rutherford.
Luke wakes up with a start. He is hearing strange noises coming from downstairs. As he goes to investigate he sees the fridge door open, and behind it is Galvin – who is cooking an omelette. Luke's mum Jenny is complaining about how long Galvin has been away without writing. Luke questions his mum about Galvin, and finds out he is his Godfather. As Luke takes Galvin to his hotel they talk about Luke's dead father. Galvin brings up the topic of seeing strange things. Of seeing things from the corner of your eye – but when you look they are not there. On leaving the cab Galvin insists that they go out on a boy's night out, and offers one piece of advice whist throwing an envelope to him; "And if you do see anything take care. And remember... They bite!" Back at home Luke phones Ruby to cancel on her, and she arranges to come over and pick something up from Luke's place. As Luke sits back on the sofa to look at the envelope given to him by Galvin, we see the Type 3 demon from earlier scurrying across the floor. Inside the envelope are old photos with Luke's father and him as a baby in, and an even older one dating from 1891 with the name Abraham V-H written on the back. As Luke is lying back on his bed, the demon is crawling underneath it. Luke sits up abruptly and hears the demon scamper across the floor out of the bedroom. He finds it in the airing cupboard, and picks up a map to try and fight it. It eats the end of the mop! On jumping out of the airing cupboard the demon hits its head, and whilst it is dazed Luke picks up an empty basket and traps it. After answering the door to let Ruby in, Luke returns to the trapped demon, to find that it has eaten is way out!
Luke and Galvin are at a concert, and afterwards meet the star pianist, the blind lady, Mina. He introduces Luke. Mina, and shaking Luke's hand has a 'vision'. She gives him a locket saying "Seeing is believing Luke. You must believe, even when it seems impossible." As Luke and Galvin leave, Luke tells Galvin about the 'monkey' and asks who Abraham is. Galvin responds by saying he is a warrior. Luke believes he is joking. Galvin goes on to say that so was Luke's father, as was Abraham. That they were all warriors in the struggle between human and inhuman. Us and Them. Galvin goes on to talk about the inhumans as freaks, and the need to keep them in their place. As they walk along we see Redlip watching them. Luke comments "Like vampires and warewolves". Galvin responds that they don't care to name them. They just grade them and smite them. We see Redlip still watching them from across the room, as he feeds a cockroach to the Type 3 demon in his cloak. Meanwhile Galvin tells Luke that Abraham was Abraham Van Helsing. That his mum's name is Rutherford, but that his dad's name was really Van Helsing. Luke thinks Galvin is taking the piss. That Van Helsing is a character from a book. Galvin goes on to say that was identity theft. That Bram Stoker stole the name. That Abraham Van Helsing was real.
Galvin takes Luke to Abraham's Library, known as The Stacks. Here Luke is shown a video from his Dad telling him everything around him is his. Galvin reiterates the need to keep his mum from knowing the truth; that this is his destiny, and he doesn't have a choice. Luke says everyone has a choice, and goes to meet Ruby. On walking home they meet some 'Noisy Boys'. Luke fights them off, but is held by Redlip. Galvin appears and fights Redlip off. Back at Luke's Mina joins Galvin before her and Luke head to The Stacks to get some weapons, whilst Galvin takes Ruby home. On her way up to her flat Ruby is met by Redlip. She flees into a lift, where she is eventually caught by Redlip, but not before she managed to leave a message for help on Galvin's phone.
Redlip phones Luke using Ruby's phone, and tells him to come alone, otherwise Ruby will get hurt. Gladiolus Thrip, the Type 12 Bounty Hunter introduces himself to Ruby. Meanwhile Mina 'senses' the location of Ruby and her kidnappers, and Galvin heads off to find her. Luke arrives, only to find a Noisy Boy wearing her coat. Thrip takes his gun, before he is knocked unconscious by Redlips. While carrying Luke outside, Redlip and Thrip meet Galvin. Galvin shoots Redlip, and disintegrates him, whilst his gun has no effect against Thrip, who knocks Galvin over with a sonic scream before running off. Luke runs off to free Ruby. Thrip appears and holds Ruby hostage, threatening to cut her throat if anyone comes near. Mina tells Luke to shoot Ruby, as whilst in The Stacks she had told him that the bullets only hurt 'freaks', and just bump humans, but don't break the skin. Luke eventually does shoot Ruby, who falls to the floor, before shooting Thrip. At first it appears as if it had no effect, before Thrip eventually explodes in a burning mess.
Back at school Luke is confronted by his Physics teacher for not doing any revision for his test. Mid-sentence his phone rings, and he leaves to get into a Limo with Galvin.