Seth, Anaya, and Petra are strangely immune to the plants' toxins and found a way to combat them. But just as they have their first success, the rain begins again. This rain brings eggs. That hatch into insects. Not small insects. Bird-sized mosquitos that carry disease. Borer worms that can eat through the foundation of a house. Boat-sized water striders that carry away their prey. But our heroes aren't able to help this time--they've been locked away in a government lab with other kids who are also immune. What is their secret? Could they be... part alien themselves? Whose side are they on?