一个不祥的广播给观众带来了20世纪80年代被遗忘的噩梦：一名灾难恢复人员释放了一位古代神的愤怒；使死人复活的湖；行为艺术作品与来自远方的生物接触；一场血雨腥风的亡灵大屠杀，以及令人不安的谋杀录像。

When Billy witnesses his parents’ grisly murder on Christmas Eve at the hands of Santa, it ignites a lifelong mission to spread holiday fear. Every Christmas, he dons the jolly red suit and delivers a blood-soaked massacre to feed his twisted sense of justice.

A team of young doctors on a humanitarian mission through the Amazon rainforest come to realize that not everyone – or everything – is happy to see them. Their arrival draws the attention of an ancient predator, the “Boiúna”. This ancient killer, dominant on land and water, emerges to reclaim the jungle. The ensuing fight for survival blurs the roles of hunter, prey, and hero.