Juliet Forrest, daughter of scientist and cheesemaker John Forrest, asks
private investigator Rigby Reardon to investigate her father's death. Searching Dr. Forrest's lab, Rigby finds two lists, "Friends of Carlotta" (FOC) and "Enemies of Carlotta" (EOC), and an autographed photo of singer Kitty Collins, whose name appears on one of the lists. A man shoots Rigby in the arm and takes the lists. Rigby finds his way to Juliet's house, where she sucks out the bullet. Juliet also reveals a note to her father from her brother-in-law, Sam Hastings, which reveals that Dr. Forrest gave Sam a dollar bill "for safekeeping". When Juliet mentions her cleaning woman, Rigby goes berserk due to his father running off with his cleaning woman and Rigby's mother dying of a broken heart. Rigby tracks down Sam and gets Dr. Forrest's dollar, which has FOC names scrawled on it — including Kitty and her boyfriend Swede Anderson. Rigby tracks down Kitty, asking her whether she is one of Carlotta's friends, which causes her to leave. He trails her to a restaurant, where she ditches her brooch into her soup. Rigby retrieves the brooch, which contains an EOC list on which all names are crossed out except Swede Anderson's. Rigby visits Swede, but Swede is killed. Rigby is shot in the same arm as before, requiring Juliet to suck out another bullet. Rigby calls his mentor
Philip Marlowe for assistance. Juliet hands over a key from Dr. Forrest's desk and a key to train station locker 1936. Marlowe picks up the EOC list to check for unsolved murders. Rigby goes to the train station locker, which contains more lists. He finds F.X. Huberman, whose name was on one of the lists, throwing a party. She flirts with Rigby, then drugs his drink and steals the locker key. Juliet finds Rigby and informs him that Sam fell from a window reaching for a bottle of whiskey. She has an article from
The New York Times about a cruise ship called
Immer Essen; Sam Hastings was a passenger. When Marlowe calls, Rigby questions him about Walter Neff, the ship's owner, and learns that Neff cruises supermarkets for blondes. Rigby disguises himself as a woman and meets Neff. Rigby drugs him and finds a passenger manifest for the
Immer Essen identical to an EOC list and articles about the ship's imprisoned captain, Cody Jarrett, who refuses to talk to anyone but his mother. Rigby dresses up as Jarrett's mother to visit Jarrett. He tries winning Jarrett's confidence, explaining that the FOC are after him. When that fails, Rigby impersonates a prisoner. Jarrett turns out to be a FOC and shoots Rigby. After sucking out a third bullet, Juliet leaves for the drugstore. Marlowe informs Rigby that Carlotta is an island off
Peru. At a cafe, Rigby finds Kitty. Carlos, a policeman, warns Rigby of the locals, including Kitty's new boyfriend, Rice. The next day, one of the locals approaches Rigby and tries to bribe him into leaving the island. Kitty drops by Rigby's room. Carlos is telling him Rice is in town with a group of Germans when the telephone line is cut. Kitty drugs Rigby's drink, and he wakes up to find Rice choking him. After a chase, Rigby shoots Rice and frisks the corpse, leading him to a hideout where he finds Juliet, her father still alive, and her butler, Field Marshal Wilfried von Kluck. Dr. Forrest divulged a secret cheese mold to
Nazis posing as a humanitarian organization. Once he discovered their intention to use the mold's corrosive properties to destroy America with strategically placed cheese bombs, he assembled a list of Nazi agents, the FOC. Before he could divulge the names to the
FBI, he was abducted and his death faked to prevent a police investigation. The
Immer Essen, a cruise ship passing by, witnessed the mold tests, making all passengers EOC. Rigby is captured but Juliet gets Wilfried to say "cleaning woman", causing Rigby to go berserk, break his chains and overpower the Nazis. While Juliet gets Rodriguez, Wilfried pulls one of the switches, destroying
Terre Haute, Indiana, before being killed by Rigby. Rodriguez rounds up the other Nazis while Rigby shares a kiss with Juliet. ==Cast==