After disappearing over fifty years ago, an ancient artifact known as the Mask of Anhang resurfaces at an archaeological dig in the Amazon. It is brought to Sao Paulo to be exhibited at a museum, but before reaching its destination, the Mask starts to claim its victims as it possesses and forces them to carry out visceral sacrifices in a gruesome fashion. With the body count increasing, it's up to Officer Beatriz Obdias to find the Mask and put an end to the murder spree.