Miami Connection (which actually takes place in Orlando not Miami) is the work of YK Kim who starred, produced and wrote this film. His acting and script writing may be rather suspect though his taekwando, as showcased in the film, is undeniably excellent.
A gang of motorbike riding ninjas are moving in on the drugs trade in Florida. However their attention is soon drawn to a rock group (and we get a number of quite acceptable if cheesy 80s soft rock tunes in this film) who incorporate martial arts into their act. The film consists of a number of decent action set pieces held together by a flimsy and often contradictory script...
The film is awful but also brilliant. The film takes some of the best and cheesiest aspects of 80s culture and mixes them in a blender. Somehow it all works and it is easy to see why the film has become a cult classic. It makes little sense but once you accept that you can appreciate it for the unintentional genius it really is.