Caro and Anna are best friends ... they were best friends. Over a decade, Caro and Anna have bonded while raising their daughters, two little girls the same age but living two very different lives. The women have supported each other as they have shared the joys and trials of motherhood, but now everything has changed.There's been a terrible car accident, an unimaginable tragedy that leaves both families devastated. Over two days, as Caro and Anna each detail their own versions of events, they are forced to reveal hidden truths and closely guarded secrets.The complicated lives of wives and mothers are laid bare as both women come to realise that even best friends don't tell each other everything. And when hearts are broken, even best friends need someone to blame.