Connie thinks she's never met anyone quite like Luke Beith before.

She has no idea how right she is.

As a high-ranking mathematician in a male-dominated field - with bright red hair - Connie's used to being considered a little unusual.

But she's nowhere near as peculiar as Luke, who is recruited to work alongside her on a top-secret code breaking project.

Just what is this bizarre sequence they're studying? It isn't a solution to the global energy crisis. It isn't a new wavelength to sell microwave ovens. The numbers are trying to tell them something . . . and it seems only Luke knows what.

The truth is out there. Will Connie dare to find it?

In this whirlwind adventure, Sunday Times bestselling author Jenny Colgan boldly goes where no author has gone before . . .