Mae has been working as a chemist in a dead-end lab with colleagues who don't take her seriously. One day, she gets unexpected results while testing bayou samples from a local nature preserve. The implications could be mean a brilliant discovery or a lethal infestation that threatens Redbluff.

As Aphra, Holly, and Mae move forward with their own agendas, their paths inevitably intertwine. They must learn to trust each other to survive as Redbluff descends into a living nightmare.