Best friends Isla and Sophie made each other a promise a long time ago: to never let life pass them by. Years later, Isla is in love, living abroad and fulfilling her dreams. But for Sophie, things haven't turned out the way she was expecting and she hasn't achieved any of the things she and Isla talked about. And then, in one sudden moment, life irrevocably changes for both women. Isla and Sophie have hard decisions to make but above all else they must face up to the uncertainty that lies ahead.