在加拿大纽芬兰的一个偏远小渔村，海洋深处出现神秘的巨大未知生物，开始攻击并摧毁沿海城镇。一名渔夫和一名海洋生物学家携手合作，试图找出水面下的恐怖秘密与生存之道。

Based on the novel The Unbelieved by Vikki Petraitis.　　Dustfall is described as a propulsive, atmospheric Tropic Noir that follows a detective whose deep sense of justice is challenged by a world where victims are doubted, predators hide in plain sight, and the legal system too often falls short.　　When seasoned detective Tig (Torv), returning to her hometown of North Gap after years in the city, uncovers a string of drink spiking assaults, the case is turned on its head when one of the main suspects is found murdered.