“On the Side of the Angels” tells the stories of several prominent "whistleblowers" (employees who decide to publicly recognize malfeasance, corruption or other wrongdoing in the company) around the world, including Sherron Watkins, a Vice President of Corporate Development who helped uncover the accounting fraud at Enron; Glenn Walp, former Security Officer at Los Alamos National Laboratory who exposed corruption and theft at the national security facility; Joseph Mangan, an American aviation engineer who informed the European authorities of safety violations in the manufacture of the new Airbus A380 airliner; Jean-Luc Touly, an employee of Véolia Water, who exposed financial fraud in the French national firm; and Adamo Bove, Head of Security at Telecom Italia, who uncovered a secret bugging system installed in cell phones worldwide. Political science professor and author William Weaver discusses the psychological profile of typical "whistleblowers," and the lengths to which they will go to live up to their own moral code. The film recounts the heroic efforts of each of the principals and the consequences of their actions, from losing their jobs and being persecuted by their former employers to dying under mysterious circumstances.