A medical breakthrough solves the problem of endless old age: if a person has had enough of life, their 'Switch' flips and they instantly die.

15-year-old Margaretta lives in fear of her Switch. Since her mum died four years ago, she has lived alone with her violent father and survived only by shutting out all feelings. Margaretta's emotional armour starts to crack when she meets Sky, a charismatic vagabond, and runs away with him.

Sky introduces Margaretta to the exhilarating atmosphere of the Blue Cat nightclub. But as the attraction between them intensifies, they find themselves drawn into a murky world of political corruption controlled by the club's shady clientele. With dishonesty eating away at the heart of power, countless lives are on the line.

Emotions can kill, but Margaretta has just begun to feel alive.