The film begins with the hard rock band, Triton, travelling through the desert in their bright pink tour van. They reach the town of Grand Guignol, which appears to be a place stuck in the past with outdated technology and strange locals. The band members are initially hesitant about playing in such a remote place, but their lead singer, Jessie, insists they play.
As they perform their music, the crowd seems unimpressed and even hostile. The band decides to take a break and explore the town, only to discover that it's inhabited by werewolves, a dwarf who murders people, and a group of Nazi sex perverts who are experimenting with reanimation techniques.
Things take a bizarre turn when the band is murdered by the Nazis in a twisted sex ritual. However, Jessie is not willing to accept his death and decides to use his musical powers to return from the dead and help Cassie, a girl he had fallen in love with before his untimely death.
Jessie and the other undead band members discover that the Nazis are planning to create an army of zombie soldiers that they will use to conquer the world. The band must stop the Nazis and their legion of zombie soldiers before it is too late. Along the way, they face numerous obstacles and challenges, including a showdown with Hitler himself.
Hard Rock Zombies is a hilarious and campy horror-comedy that takes audiences on a wild ride. The film is full of absurd plot twists, over-the-top performances, and cheesy special effects. It's a must-see for fans of cult classics and rock music.