It's a normal sunny day when Mia sees her ex-boyfriend on the street where she lives. But she knows that's crazy. She knows it can't possibly be him. She knows... because she killed him.

Mia and Carrie have been best friends since school. They share everything: clothes, shoes, a home... and their secrets.

Only Carrie knew what Mia did that night. Where everything went wrong and Mia's boyfriend attacked her, so she attacked him right back.

Carrie made the problem go away. Like she always would for her best friend. They've got on with their lives. Mia's even met someone new - a man she thinks she could be with forever.

But now it looks like her ex is back. Alive and well. So either Mia is losing her mind, or somebody very close to her has been lying...