This supplement is everything that an introductory superhero adventure supplement should be. It contains a straightforward plot with several solid, genre-appropriate set pieces, interesting characters and gives the strong impression of a larger, wider world.
The characters (optional pregenerated characters are provided, along with colorful character sheets) face off against a vigilante who has crossed the line and has been killing gang members in a bad part of town. Of course there's more going on than meets the eye, and a superscientific organization is also introduced, trying to cover up their involvement as well.
Probably the most important thing that sets this adventure supplement apart is the extensive appendix, in which all the players in the scenario are detailed very thoroughly, so that the GM has a great deal of material to extrapolate from, to make the world more real-feeling. This is very important in a genre about people in dance outfits shooting lasers at each other.
The adventure really gives a solid introduction to the BASH system and I would highly recommend it for a first night of play for anyone wanting to get things started in that system without jumping in cold.