In 1839, the Amistad, which was transporting black slaves, encountered a storm in the ocean. The black slaves took advantage of the chaos to riot, hacked and killed the crew, and tried to sail back home after controlling the Amistad. However, six weeks later, they arrived in the United States by mistake. The 44 surviving black slaves were arrested by the US military and will face charges of murder. At this time, the Queen of Spain asked the President of the United States to extradite these black slaves belonging to Spain; two naval officers also claimed that the black slaves were their spoils of war; others took out proof of buying these black slaves in Cuba. While the parties were arguing, Jodson (Morgan Freeman), one of the leaders of the abolitionist society and also the head of the shipping company, and his friend Tapian hired lawyer Roger, hoping to prove that these black slaves came from Africa, so as to seek freedom for them in the environment where the concept of abolition is deeply rooted in the hearts of the people...