Murder comes to Norfolk Island, but is the killer after Alexandra Archer’s Tahitian black pearl or a lost illustration of the rare Green Parrot?

The Thorntons, along with a small team of people, mount an expedition to Norfolk Island, a small island in the South Pacific, to study the Green Parrot and set up research programmes to help protect it and other endangered birds.

As a birthday surprise, Alexandra’s father tells her she is to be the official photographer for the expedition. Her father gives her a black pearl brooch that Alexandra’s great-grandfather had bought off a merchant in Hong Kong in the 1850s. The pearls are Tahitian black pearls.

Before they depart Melbourne, they learn that Norfolk Island has had its first murder. It sends ripples of unease through Alexandra. She hoped she could escape murder on this small island paradise.