Fellow private investigator Charlie Frome is killed by a hit-and-run driver, apparently while working on a case, and Joe Mannix decides to see if he can determine why Frome was murdered. He learns that Frome was working for television star Danny Brite, but Brite claims he hired Frome only to look for a former acquaintance. Based on evidence found in Charlie Frome's apartment, however, Mannix concludes that Frome's investigation involved a soldier in Vietnam who has gone missing in action -- and possibly someone who is blackmailing Danny Brite.
—aldanoli