In 1951, a poor tobacco farmer changed the face of medicine for ever. Henrietta Lacks died of cervical cancer when she was 31.

Unknown to Henrietta, her cancerous cells were taken for analysis and became one of the most important tools in modern medicine, crucial in the development of a polio vaccine, cloning and IVF, among other things.

Oprah Winfrey stars as Henrietta’s daughter, Deborah, in this feature-length drama about her family’s fight for the truth behind the harvesting of her cells.

Rose Byrne plays journalist Rebecca Skloot, whose book first brought the story to public attention.