So B. It (2016)

A mentally disabled 12-year-old girl named Heidi lives together with her agoraphobic mother, and has only two constants in her life - a mysterious word 'Soof' and a quarter her mother gives her every day. When Heidi discovers an old photo of her mother and a baby, she decides to travel to Reno, Nevada to find out more about her past. Along the way, she meets a kind-hearted African-American woman named Bernadette, who agrees to help her on her journey. Through a series of adventures and encounters, Heidi uncovers the truth about her family and finds a sense of belonging.