The year is 1820, and trade between Cuba and Catalonia is a booming business, although the goods that arrive to Cuba are not always the products that were shipped, in some cases, they simply arrive "lumps" or "coal". As it appears in the logbooks of the ships. 'Havanera 1820' is a film that tells stories of love and adventure in a time when Cuba confronts the Spanish colonizers. Amelia, a young Catalan, marries by proxy with Tom Masana, a rich man with close relations with Cuba. During the trip that takes her by boat from Canet to Havana, she discovers that her husband is the main beneficiary of a slave trafficking network. In Cuba, she will also see how he maintains an extramarital relationship with a slave named Consuelo. Then, she, along with Consuelo herself and Alfonso Rovira, the man who loves her will make Masana fall.