A fit and active dance instructor is suddenly stopped in her tracks by unbearable abdominal pain and a mysterious mass in her colon that is revealed to contain decaying worms. And a scientist finds worms from Africa living under his skin and in his eyes.

An invisible attacker ravages a 4th grade teacher from the inside out. A ticking time bomb threatens to end a young dancer's career.

A nine year old hockey prodigy is attacked by a brain eating monster and brought to the brink of death. A computer programmer from Virginia loses control of his mind when his body is invaded by the deadliest parasite on earth.

A three year old begins having extreme bouts of vomiting and diarrhea, her parents think she just has a stomach flu. But when she loses a third of her body weight in only a few days, they are left desperate and helpless.

A seemingly innocent cat scratch leaves a veterinary volunteer with a raised and growing wound on her chest. When it begins to move, she's horrified by the thought of a monster growing inside. And, a college student's arm begins oozing a strange liquid.

An Iraq war veteran wakes in the middle of the night with an uncontrollable urge to relieve himself, and he heads for the bathroom. The foot-long worm he pulls from inside him will change his life forever.