This is what we found on Wikipedia regarding the Les Miserables: The Arena Spectacular:

Les Misérables ( lay MIZ-ə-RAHB(-əl), -⁠RAH-blə, French: [le mizeʁabl]), colloquially known as Les Mis or Les Miz ( lay MIZ), is a sung-through musical with music by Claude-Michel Schönberg, lyrics by Alain Boublil and Jean-Marc Natel, and a book by Schönberg and Boublil, based on the 1862 novel of the same name by Victor Hugo. Set in early 19th-century France, Les Misérables tells the story of Jean Valjean, a French peasant, and his desire for redemption. After stealing a loaf of bread for his sister's starving child, Valjean is imprisoned for 19 years and released in 1815. When a bishop inspires him with a tremendous act of mercy, Valjean breaks his parole and starts his life anew and in disguise. He becomes wealthy and adopts an orphan, Cosette. A police inspector named Javert pursues Valjean over the decades in a single-minded quest for "justice". The characters are swept into a revolutionary period in France, where a group of young idealists attempts to overthrow the government at a street barricade in Paris.

The French musical premiered in Paris in 1980 with direction by Robert Hossein. Its English-language adaptation, with lyrics by Herbert Kretzmer, produced by Cameron Mackintosh, has been running in London since October 1985, making it the longest-running musical in the West End and the second longest-running musical in the world after the original off-Broadway run of The Fantasticks. Many other long-running productions followed on Broadway and around the world, and a film adaptation was released in 2012.