The central premise of Being Human is that various types of supernatural beings exist alongside human beings, with varying degrees of menace; that three of these supernatural beings are opting to live amongst human beings rather than apart from them; and that these three characters are attempting (as much as is possible) to live ordinary human lives despite the pressures and dangers of their situations. They are constantly threatened with exposure or persecution, with pressure from other supernatural creatures, and with problems caused by their attempts to deal with their own natures.
As ghost Alex adjusts to life after death with werewolf Tom and vampire Hal, we meet poisonous pensioner Captain Hatch, behind whose foul exterior lurks an ancient evil.
Alex discovers she's not the only ghost haunting Honolulu Heights. Tom and Hal go head to head in the hotel's employee of the month competition, much to the delight of Captain Hatch, who feeds on werewolf / vampire conflict.
Tom learns how to be successful from werewolf mentor Larry, but is Larry everything that he claims to be? Alex discovers some worrying similarities with Hal's Regency ghost friend, Lady Mary.
It's vampire rehab at Honolulu Heights when Crumb comes to stay. Tom has his work cut out reintroducing werewolf Bobby to a world he's long forgotten.
When a damsel in distress seeks haven at the hotel, Tom and Hal are attracted to her for different reasons. Alex investigates her suspicions about Captain Hatch with dangerous consequences.
Hal is ready to return to his vampire ways and Tom is set on killing him as an act of revenge, but the trio have to battle the devil and Captain Hatch.