Greenstone - S1.E15

When Gervaise removes some sacred greenstone from the river, Constance becomes worried about breaking a 'tapu'. Daniel and Fergus try to frighten Gervaise into returning the greenstone, while Constance goes in search of Tamihana, an elusive Maori elder. But will Tamihana help? And will he be able to convince the stubborn Gervaise before disaster strikes?