"As the New Magini String Quartet prepares for a performance of Schubert's masterpiece, "Death and the Maiden," which it hopes will resuscitate its faltering career, someone starts picking off members of the string quartet a la Agatha Christie's And Then There Were None."""""Dogged by internal dissension and by a potentially devastating lawsuit from its fired second violinist, the famed New Magini String Quartet is on the brink of professional and...