The context is England's Civil War between the Roundheads (the Parliamentarians, or Puritans of the title) and the Cavaliers (Royalists). A love triangle between Arturo (a Puritan), Riccardo (a Royalist) and the beautiful Elvira results in a drama of escapes, disguises and captures, during which Elvira loses her reason, before a final pardon restores her senses and unites her with her beloved Arturo. The lead tenor role is notoriously difficult and Juan Diego Flórez shows no strain or difficult...