The film is inspired by the real-life experiences of Dr. Robert Cantu, who began researching the effects of head injuries on football players in the 1990s. Cantu’s work led to a greater understanding of the risks associated with repeated head trauma, including chronic traumatic encephalopathy (CTE), a degenerative brain disease that has been linked to repeated blows to the head.

The film features a talented cast, including Will Smith, who plays Dr. Cantu, and Matthew Fox, who portrays Dr. Robert Stern, a neuroscientist who helps Cantu with his research. The movie also stars Emily Mortimer, John Hurt, and Adewale Akinnuoye-Agbaje.

The film tells the story of Dr. Cantu’s journey as he navigates the challenges of convincing the medical community and the NFL of the risks associated with head injuries. The movie follows Cantu’s struggles to get his research recognized and his efforts to educate football players, coaches, and parents about the dangers of head injuries.

If you have any specific questions or would like more information on the topic, feel free to ask!