The Jerk (1979) follows naive Navin R. Johnson (Steve Martin) as he leaves his poor Black family, becomes a millionaire with the "Opti-Grab" invention (which makes people cross-eyed), loses it all, and finds true happiness back with his family and love, Marie, embracing his simple roots and gaining rhythm, while its sequel, The Jerk, Too (1984), sees Navin trying to go straight but getting pulled into a Las Vegas casino heist.