Luke Rutherford is your average teenager – until his dead father's best friend, Rupert Galvin, turns up. Galvin has come to tell Luke his secret destiny: he's the real-life great-grandson of Abraham Van Helsing, the vampire hunter in Bram Stoker's Dracula. Luke is set to inherit the family mantle as a warrior against the supernatural entities swarming the earth.

Unfortunately, powerful Half-Life, Gladiolus Thrip (Mackenzie Crook) is standing in his way.

Six-year-old Madge might think her sister has been ‘taken up to heaven by an angel’ but Galvin suspects otherwise. Everything points to half-life involvement and he thinks it’s the perfect project for Luke.

A visit to zombie priest, Father Simeon (guest star Richard Wilson) confirms Galvin’s suspicions. Gilgamel is no angel – he’s a demon, a travesty demon, a Type 9 entity attracted by the odour of sanctity. Can Luke rise to the challenge?