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Du bist Mein Gluck (You Are My Joy) was the third starring feature for the great Operatic tenor Beniamino Gigli. Gigli's imposing presence and splendid singing notwithstanding, the film is dominated by Isa Miranda in a dual role. After deserting her husband to shack up with Mario Monti (Gigli), Bianca Scarpa (Miranda) returns home years later to beg for custody of her child, only to be throw out into the street. Years later, the child has grown up into a beautiful young woman and an excellent dancer (Miranda plays both mother and daughter). Feeling guilty about causing so much family dissension, Monti tries to arrange for a reconciliation between Bianca and her daughter. The musical highlights in Du bist Mein Gluck feature such operatic luminaries as Hildegarde Ranczak, Maria Cornelius, and Ludwig Weber.