HENRY: PORTRAIT OF A SERIAL KILLER is a chilling profile of a cold-blooded killer that, 30 years after it's historic festival premiere, has lost none of it's power to shock. The film, loosely based on a true story, has been hailed as one of the most disturbing and terrifying examinations of mass murderers ever filmed. Henry (Michael Rooker, The Walking Dead) is a psychopathic drifter who has coldly murdered a number of people for no particular reason and without any remorse.