Gwen Cummings (Sandra Bullock - While You Were Sleeping, Speed) s a succesful New York writer who's everyone's favourite party girl.

Life to Gwen and her boyfriend, Jasper (Dominic West), is just a fun-filled exercise in debauchery; stumbling from bar to night-club to hangover, until Gwen's alcohol-fuelled display at her sister Lily's (Elizabeth Perkins - Crazy in Alabama, The Flintstones) wedding results in a drunk-driving charge and a court order to spend 28 days in rehab.

Determined she does not belong. Gwen refuses to conform to the unique set of rules and rituals she is faced with. It's only through the relationships she forms with the other patients and her counsellor. Cornell (Steve Buscemi - Big Daddy, Desperado) that she begins to realise that there may be more to life than being the life and soul of the party.