A Jewish housewife, an R&B singer, and a rabbi (turned comedian) are all trapped in a hotel as a tsunami hits. Sounds like the premise to a joke, but it is actually the inciting incident for these three main characters, as well as for the numerous minor characters who share in the lives of these people.
Their lives intersect each other, directly and indirectly, over the course of the story. These intersections are often comedic if not completely coincidental, but the author does a nice job of establishing this style and tone early. By the end we believe that any crossing of paths is not only possible but likely, necessary even.
Dworkin's characters, and the situations they find themselves in, are larger than life. This is not realism. But the author makes an impact by providing rich and often humorous detail for how her characters grow, and how their lives impact each other, even when thousands of miles apart. Ultimately, every character, even the minor ones, have experienced profound change. By the climax every character, especially the Candy of the title, is radically different.
The tsunami as an inciting device may not completely work, but it does serve as a nice metaphor for how we have to have strength and courage to overcome forces external and internal. The book never quite rises to the level that the opening tsunami portends it might, but it is a fun read, littered with vivid, memorable, and wonderful characters.