“Satan & Adam” is a celebration of the transformative power of music and the bonds that develop when worlds collide and artists collaborate. One day in 1986, Adam Gussow, a white, Ivy League-educated harmonica player, found himself nursing a broken heart and walking down the street in Harlem, a block from the Apollo Theater. There, he came on a one-man band: Sterling Magee. Better known as Satan, Magee was a local legend with heavy blues guitar riffs and makeshift percussion instruments. When Adam sat in on a session with Satan that day, a most unlikely connection was formed, and their partnership and friendship would transcend the racial tensions of a segregated city. After the post-film Q&A, the Blues Doctors will perform a concert, with Gussow on harmonica and percussion, Alan Gross on guitar, and both men on vocals.