Young CeDell Davis learns to play the blues unlike anyone else—with his guitar upside down and a butterknife in his hand—and becomes a legendary musician.

For young CeDell Davis, the blues cut straight to his heart. He wanted to play, but he had no instrument. He became an inventor: nailing wire and a rusty barrel ring to the side of his house so he could jam all day.

When he finally got a real guitar, CeDell played better than ever–but when he was about 10 years old, his body grew weak. After years spent battling polio in the hospital, he was finally well enough to come home and dust off his guitar. But he couldn’t play it. Polio had weakened his left, fretting hand and stiffened his right, strumming hand. Turning his guitar upside down and grabbing a butterknife from the kitchen, CeDell invented a whole new way to play the blues—a way that would one day get him up on stage, jamming with his musical idols.