With its enchanting setting and spellbinding score, the world’s most popular opera is as timeless as it is heartbreaking. Franco Zeffirelli’s picture-perfect production brings 19th-century Paris to the Met stage as Puccini’s young friends and lovers navigate the joy and struggle of bohemian life. Sopranos Juliana Grigoryan, Angel Blue, and Aleksandra Kurzak trade off as the feeble seamstress Mimì, opposite tenors Freddie De Tommaso, Stephen Costello, Adam Smith, and Long Long as the ardent poet Rodolfo.