This documentary follows Tetsuji Tanioka over a period of 3 years, as he cares for his daughter with Rett Syndrome. A rare neurological refractory disease that occurs almost exclusively in females, the condition leads to regression in physical and linguistic ability. Worldwide, only one in fifteen thousand are afflicted and there are estimated to be only one thousand patients aged under 20 years. Mr. Tanioka has established an NPO, makes donations to scientists researching medicine, and goes to great lengths to support his daughter. He hopes to find a treatment and someday hear his daughter call him “Dad!”