Flo and Kay Lyman are identical twins, both autistic savants, said to be the only known pair of their kind in the world. The film follows their daily life, showing how each sister processes numbers, dates, and music with abilities that stand far outside ordinary memory or calculation, while also living with the communication and social difficulties that come with autism. Family members and the twins themselves speak on camera about growing up different, the misunderstandings that followed them through school and public life, and how their parents adapted to raising children whose minds worked in such an unusual way. The documentary treats the sisters as people rather than curiosities, spending time on the mundane alongside the extraordinary: routines, sibling dynamics, and the small negotiations of living with a disability that also produces remarkable skill. It is a close, personal portrait rather than a clinical study, built around the two women at its center.