As the clock strikes midnight on New Year's Eve, Cassandra Cherry's life takes a turn for the worse when she stumbles upon husband Stevie lying naked, except for his socks, on a coat-strewn bed with a 45-year-old divorcee called Cynthia. Suddenly single, Cass throws herself into the business of getting over Stevie with gusto. Her main problems now are making her nine-year-old twins happy, juggling a new social life with a return to work and avoiding being arrested by an infuriating policeman who always seems to turn up at the most inopportune moments. Then, just when Cass is least prepared, and much to Stevie's chagrin, she crashes head over heels in love with the last person she'd ever expected.