There's a struggle being waged in the U.S. today - over how we treat the animals that end up on our dinner plates. More than ten billion animals are raised for consumption in the U.S. every year, most on industrialized "factory farms." Virtually no federal laws mandate the humane treatment of farm animals. Because most state laws are weak and/or rarely enforced, animal-rights groups have turned to undercover investigators to help expose abuse on factory farms. This is the story of one such investigator's disturbing descent into a factory farm. Following the success of the 2006 documentary Dealing Dogs, directors Tom Simon and Sarah Teale return to HBO to tell the story of an animal-rights investigator, "Pete," who goes undercover on a factory hog farm to explore a whistle blower's allegations.