Mickey and Kacey Fitzgerald are sisters who grew up together but that is where the similarity ends.  Mickey is a policewoman in Philadelphia raising a young son; Kacey is an addict who has been living on the streets for years.  When Mickey discovers a woman murdered on her beat, she has the shocking feeling that her sister might be the next victim.  While Mickey searches the crime-ridden neighborhoods of Philadelphia for her younger sister to alert her,  her mind keeps going back to the past and how Kacey played a major role in it.

Long Bright River is a good read.  Moore vividly portrays the seamy areas of Philadelphia, and she creates a page turner where the reader wants to discover the killer and what happens to Kacey.  Long Bright River would be a fine choice to take on a long plane ride.