He's hired by a friend of his brother, Marty, who is in prison.
The man who hires Jack is gunned down shortly thereafter and Jack wants to know why.
As he begins his investigation, we cannot help but remember another Boston, P.I., Robert Parker's wonderful character, Spencer. The author also seems influenced by Mickey Spillane and in Reilly we have a new and improved, Mike Hammer.
The author has given the reader a view of the mean streets in South Boston adn a modern P.I. who knows how to survive in those mean streets.