"Sweeney Todd" is a musical thriller created by Stephen Sondheim that tells the story of Benjamin Barker, a barber wrongfully imprisoned for years. Upon his return to London, he adopts the name Sweeney Todd and seeks revenge on the corrupt judge who ruined his life. With the help of Mrs. Lovett, a pie shop owner, Todd begins a dark partnership that leads to a series of gruesome murders. The story explores themes of vengeance, justice, and the consequences of obsession, ultimately culminating in a tragic and shocking conclusion.