As the clock strikes midnight on New Year's Eve, Cass finds her husband lying naked on a coat-strewn bed, entwined with another woman. She's determined to get over him – and soon. Luckily, there are plenty of distractions: juggling a young family with a burgeoning social life and a return to work… and narrowly avoiding arrest. Then one day, she falls for the last person she could ever have predicted…