Ronnie and Jake are twins – obviously not identical, but close as. They even have that twin intuition thing going on. 

Ronnie lives with her soon-to-be husband and new-born baby, and Jake is happily married with two daughters. One sunny April day, he hops onto somebody else's motorbike to ride home when a horrific crash leaves him lying brain injured on the road.

On hearing the news Ronnie rushes to Jake's bedside. Having once been a physiotherapist, she knows it's bad, and her life threatens to crack apart as she begs him to return to her.

Fifteen months later, it's suggested by Jake's wife that the two families go away to Brittany, France, on holiday. But surely, it's too soon, thinks Ronnie. The tensions and events which follow threaten to rock both Ronnie's marriage and her relationship with her sister-in-law, as she tries to reach Jake. And when secrets from their past begin to surface, will Ronnie seek comfort from another man?

At the heart of it all is Jake, who is more than her brother, he is her twin. Once they floated side by side in their mother's womb. Can Ronnie somehow remind him of the person he once was, or is he changed forever? 

The world turns with or without them, a butterfly flaps its wings, and only hummingbirds fly backwards.