Best friends share everything. But murder is different. Isn't it?

Keeley and Jude are closer than blood. They share everything: clothes, secrets, drinks – and blame. So when they wake up after a New Year's party to find Keeley's boyfriend stabbed to death beside them, they agree to share one more thing: the story they'll tell the police.

But who is their story really meant to protect?

As the murder investigation begins to send uncomfortable ripples through their community, the history of the girls' claustrophobic relationship comes under scrutiny, will the girls find there's such a thing as sharing too much?