I Puritani is the story of love between Elvira and Arturo amidst the English civil war of the 1640s. Elvira's hand has been promised to Sir Richard Forth, whom she does not love. Instead, she is madly in love with Arturo Talbo. Realizing his niece's sadness, Sir Giorgio convinces her father, Lord Gualtiero, to allow her to marry Arturo. At the wedding celebration, Arturo discovers that Queen Enrichetta is a prisoner in the castle. By covering the queen in a wedding veil, Arturo helps the Queen escape from the castle. Meanwhile, Elvira thinks that she has been abandoned. In the end, Arturo and Elvira are reunited and the two will live in happiness.