What if you fell for the most impossible woman: your best friend's girlfriend?

Maxine "Max" Hallwell has spent her entire life making the safe, responsible decisions. It's not that she never had dreams, but while her childhood best friend, Joanna, risked everything to start her own delivery business, Max went to work at a call center. Now, their fortieth birthdays are fast approaching, and Joanna is rich, high-powered and happy. And Max is miserable.

When Joanna introduces Max to her new girlfriend, Fiona—a stunning, charismatic cake decorator Jo met at a businesswomen's dinner—Max is nothing but happy for her. After all, Fiona is the woman of Joanna's dreams. Fiona's so wonderful, in fact, that she encourages Max to finally open her own business, and offers to help her get it off the ground. That Max is deeply attracted to Fiona means nothing. Max has been best friends with Joanna too long; she'd never hurt her.

But one night, everything changes when Fiona admits her feelings for Max. And Max is left with an impossible decision: be true to her best friend...or the woman who's woken her heart.