In the 1960s a counterculture revolution was upending traditional norms of life, and the Grateful Dead were providing the soundtrack... and the drugs. LSD was having a revolution of its own, and the Dead were rubbing elbows with its biggest proponents. They headlined Ken Kesey’s acid tests and put acid guru Owsley Stanley to work as their audio engineer. Of course, this put them right in the crosshairs of the FBI. But while the feds had a file on the band, did they also have a deal together? Some say the disastrous Altamont Music Festival has all the markings of sabotage...