The film chronicles the life of Nelson Mandela, beginning with his early days in the rural Eastern Cape as the son of a tribal chief. It follows his move to Johannesburg where, as a young and vibrant lawyer, he becomes engaged in the political struggle against the brutal apartheid regime. His activism leads him to join the African National Congress (ANC), advocating for the rights and freedom of the black population in South Africa. Mandela's commitment to justice and equality results in numerous arrests and leads to his growing national and international reputation as a leader in the fight to end racial segregation and discrimination.

Faced with increasing government oppression, Mandela and his colleagues in the ANC make the difficult decision to fight apartheid with acts of sabotage against military and government targets. As a result, Mandela becomes a wanted man and eventually is captured by South African authorities. After a trial that captures the world's attention, Mandela is sentenced to life imprisonment for his actions against the apartheid system, and he is sent to Robben Island, where he spends many years. The story thus far not only explores Mandela's political and personal struggles but also delves into his family life, including his relationships with his wife and children who endure their own hardships due to his commitment to South Africa's liberation.