Robert Johnson was one of the most influential blues guitarists ever. Even before his early death, fans wondered if he’d made a pact with the Devil.

Run-D.M.C. DJ Jam Master Jay made a huge impact in music and his community. But friends and family still seek closure years after his unsolved murder.

The story of the evolution of a boy from Nebraska who became one of the most respected men in the world, and the heroes who helped guide him along the…