Eric Thrashmettle is a retired rock'n'roll legend—or dinosaur, depending on your perspective. His kids—Lulubelle Flower Fairy Thrashmettle (Lou) and Living Buddha Thrashmettle (Buddy—are mortally embarrassed by his every move. But Eric is broke, his wife Wave is spending a fortune at a distant luxury yoga retreat, his manager Per has disappeared—and the kids want their credit cards back. Lou and Buddy must abandon all pride and self-respect and get their terminally embarrassing dad back on the road so he can sing his epic—and lucrative—hit Pig Train once again.