Australian triplets Lyn, Cat, and Gemma Kettle are about to turn thirty-three and one is pregnant, one has just had her life turned upside down, and one is only just keeping hers from skidding off the fast lane.

Meanwhile, their divorced parents have been behaving very oddly indeed.

In this family comedy by Liane Moriarty, we follow the three Kettle sisters through their tumultuous thirty-third year -- as they deal with sibling rivalry and secrets, revelations and relationships, unfaithful husbands and unthinkable decisions, and the fabulous, frustrating life of forever being part of a trio.