"Fiendishly addictive". (Guardian). Your best friend isn't who you think she is. You've been friends since university, when you became the people you are today. You don't see each other enough but when you do it's as if you've never been apart. She's one of the family. You would trust her with your [...]

What if your best friend's child disappears? And it's all your fault. This is exactly what happens to Lisa Kallisto - overwhelmed working mother of three - one freezing December in the Lake District. She takes her eye off the ball for just a moment and her whole world descend into nightmare.[...]