Watch on HDtoday. Joan is a middle-aged man who, after a series of symptoms, discovers he has Parkinson's disease. Tremors in his hands and a sense of loss of control take over the protagonist. Over time, the tremors become more frequent and intense. In “Había una vez un hombre” we follow Joan on an emotional journey as he struggles to come to terms with her new reality and faces the physical and emotional challenges that the disease brings.