Millie has four days to save Annie Driscoll.
Millie doesn’t know how or why she has been brought into contact with Annie.
But she’s sure of one thing: Annie has already been dead for 68 years.
The Monochrome Effect: humans, birds and animals can no longer see in colour.
Caused by microplastic pollution, it has devastating global consequences.
There is no cure.
Until one girl sees a single flash of red…