A monkey raids the treehouse. Marguerite and Roxton find its stash, including a strange amulet that marks the holder when touched. That person then changes into characteristic animal form. Marguerite transforms into a snake, Challenger into a goat. To return things to normal the amulet must be placed in a stone idol.

Pics feature Rachel Blakely / Marguerite Krux, Will Snow / John Roxton, Paul Gleeson / Jack Kellar, Peter McCauley / Prof George Challenger, Jennifer O'Dell / Veronica, David Orth / Ned Malone and Shanyn Asmar /Eva.