Udo Dirschneider has invited an illustrious lineup of guests to honor the ultimate classic of his discography: Joakim Brodén (Sabaton), Biff Byford (Saxon), Mille Petrozza (Kreator), Nils Molin (Amaranthe & Dynazty), Michael Kiske (Helloween), Ylva Eriksson (Brothers Of Metal), Danko Jones, Dee Snider (Twisted Sister), Tim "Ripper" Owens (ex-Judas Priest), and Doro perform in duets with the definitive voice of Heavy Metal.