The story of two competitive and talented twins as recounted by the "ugly sister" on her deathbed.Realizing that her twin sister Helen has been born with a double share of beauty, calcium, talent, and maternal love, the young Cassandra reinvents herself on her own terms as the vulgar, uninhibited Big Bad Baby. When Helen survives their catastrophic childhood to become a successful actress, Cassandra sets out on a rampaging odyssey through New York, London, and Paris, secretly following her sister's sexual trail in order to prove her own attractiveness and worth."