The pioneers of hard rock take the stage -- and blow your mind. Led Zeppelin storm Madison Square Garden in this collection of footage taken from their legendary performances at the New York venue in 1973. Adding to the musical power and drama are hallucinatory fantasy sequences meant to illustrate each band member's mental state. Songs performed in this swirl of sound and vision include "Black Dog," "Stairway to Heaven" and "Whole Lotta Love."