Young lovers — she's a child of the ghetto, determined to escape her alcoholic, bickering parents; he's a socially prominent attorney with a long-standing health problem — attempt to defy every obstacle to their romance and ultimate marriage.
The history of Platypus Duck, the oldest surviving mammal (And a mixed-up one at that...), and a quest of one such Platypus Duck and his kids to rescue his wife after she gets swept away in a flood to Sydney.