One Bad Cat explores the art of Reverend Albert Wagner, a self-trained modern primitive artist whose turbulent life prompted him to take up painting at the age of fifty, and whose redemptive works highlight the many struggles he faced while attempting to seek salvation. Born into poverty, Wagner's marriage failed due to infidelity shortly before he was charged with child molestation. His life in shambles, the untrained artist made it his mission to combat his malaise with creativity. The resulting art was deeply personal, and sometimes controversial. The documentary offers notable insight into both the artist and the debates that his works have inspired between collectors and critics.