The Middle Sister

Jack Salvo teaches philosophy one night a week at a community college, but he pays his bills by working as an L.A. private detective. A wealthy woman hires him to find her wayward daughter Lillie, who has been missing for a week. Salvo figures the girl is probably hiding out with her friends. All he has to do is interview the friends, bust their stories, and deduce the missing brat's location. Salvo soon learns that her "friends" are somewhat parasitical. When he finds Lillie, she is hosting different kinds of parasites - the little ones that help rid the world of rotting corpses. Salvo is then pulled into a maze of murder, arson, and blackmail. During his high-speed-run down L.A.'s fast lane, he spars with grifters and gangsters, dodges the cops, and digs up a dark, deadly family secret.

[If I have to write a long version, it will take some time. I think the short version is just right.]