Synopsis

At an island archeological dig, Professor Bernard Thornton discovers Aboriginal artifacts in a cave. They include a bracelet that appears to belong to an Aboriginal woman, Warindji, who was murdered by whalers in 1856.

Nine months later, the bracelet is stolen by Aboriginal activists from a university museum. The girl who has the bracelet is caught by museum guards and beaten half to death. She dies in the hospital, and her attendant doctor is Cathy Thornton, who is the Professor's daughter. Cathy discovers marks on the girl's wrist as if she had worn the bracelet, and she has repeated visions of the whalers.

After attending her mother's funeral and the death of the activist Najira, who had stolen the bracelet, Cathy drives to the coastline off the island where her father's dig is. In the cave the Professor finds a harpoon that seems to have belonged to the head whaler who had murdered Warindji.

Cathy's boyfriend Geoff follows her to the island but she finds him dead, and she is chased by her father, who is dressed as the head whaler. A battle at the top of the lighthouse has Cathy attacking the Professor with the harpoon; he falls from the lighthouse and dies.

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