In Arthur 2: On the Rocks, the lovable alcoholic billionaire Arthur Bach faces new challenges as he deals with his impending marriage and fatherhood, all while trying to navigate through his troubled past. Along with his loyal butler, Hobson, Arthur must conquer his alcoholism and prove himself worthy of love and the responsibilities that come with it.
Arthur, a wealthy playboy, is faced with an arranged marriage in order to maintain his inheritance. However, he falls in love with a strong-willed waitress, causing a clash between love and social expectations.