A deadly strain of flu has mysteriously mutated, causing the deaths of millions throughout Ireland and beyond. But the infected don't stay dead for long, rising up to become flesh-eating monsters.
In a quarantined lab just outside Belfast, lab worker Ellis and security guard Abe fight their way through corridors of the living dead, determined to expose a gruesome truth.
Ageing conspiracy theorist Tom wracks his brain to figure out what went wrong.
Meanwhile, a young child and her two unlikely wards find themselves in the middle of a cat and mouse game involving the remains of the military, a covert government department and the ever increasing throng of dead.
The fate of humanity lies in their hands.
FEVER is the sequel to 2010's bestselling zombie horror book, FLU.