Is she your best friend, or your worst enemy? Best friends Holly and Roz tell each other everything. So when Holly gets a shot at her dream job she assumes Roz will be waiting to pop the champagne. But is she just imagining things or is Roz not quite as happy as she should be? And now she thinks about it, a few things don't quite add up... Perhaps it was a mistake to tell Roz all her secrets. Because it takes two to tango. But only one to start a war...