First of all- I love this cover.
Killraven and company are lost and tired so they decide to take shelter in an odd building. Apparently this was some kind of virtual reality place where you could experience music almost like... a drug trip. the 70's were so weird. Seriously- what were they smoking?
One thing that really gets me is how farther along people in the 70's thought we would be. We get inklings here of what the future might look like- kinda like Blade Runner- and 2019 isn't anything like that! Further, we get some exploration of when it is okay to take refuge from the real world in a fantasy environment.
In the end we almost lose a companion as one has to wonder- is an illusionary danger real if you believe it?