Tommy Bolin joined Deep purple after Ritchie Blackmore left to start the band Rainbow. Unless you are a huge fan of the band ( I don't class myself as one) its was hard to keep up with the changes but Tommy Bolin (and this track) had a profound effect on me.
I didn't find out until later that this track was a Tommy Bolin solo track that he played whilst playing with Tommy Bolin. He was a mess with drugs apparently and misses his intro but at the time (30+ years ago) this tack blew me away.
I now have the original version which is below but thought I'd had to post the one that introduced me to Tommy Bolin.