Biopic about the turbulent history of British superstars Def Leppard. After finding success at home, the British group began to top the U.S. charts with the help of the renowned producer Mutt Lange. Although drug and alcohol addiction increasingly took its toll on the band, the party continued until

Biopic about the turbulent history of British superstars Def Leppard. After finding success at home, the British group began to top the U.S. charts with the help of the renowned producer Mutt Lange. Although drug and alcohol addiction increasingly took its toll on the band, the party continued until drummer Rick Allen lost his left arm in a car accident. Pressured to find a new drummer or face the end of the group, the band instead encouraged their mate to learn to play with one arm -- and emerged to their biggest audience ever.