In Los Angeles, California, Officer Nordberg of Police Squad, a special division of the police department, boards a boat named the I Luv You in Los Angeles Harbor while he investigates heroin being smuggled from South America. Nordberg overhears that the final shipment will arrive in three days. Suddenly, Vincent Ludwig, a well-known and respected city businessman, finds Nordberg and orders his henchmen to kill him. After being shot, Nordberg tumbles overboard. Though saved by a night watchman, Nordberg goes into a coma. Later, Police Squad Lieutenant Frank Drebin is updated on Nordberg’s condition by his captain, Ed Hocken. At the hospital, Nordberg regains consciousness and tries to tell Frank about Ludwig’s connection to the smuggled heroin, but Frank misunderstands him and accidentally knocks him back into a coma. When Franks asks Nordberg’s wife, Wilma, if he told her about his undercover assignment, she gives him a photograph of the boat, I Luv You. Frank requests that Police Squad investigate the attack on Nordberg, but Ed tells him the squad has been assigned as security for Queen Elizabeth II of Great Britain on her upcoming visit to Los Angeles. At the harbor, Frank learns that Nordberg was employed by Vincent Ludwig, and rumored to be dealing drugs. Unconvinced his friend could be a drug dealer, Frank arrives at Ludwig’s office to question him. Wanting to appear helpful, Ludwig lets Frank review his employment records with the help of his assistant, Jane Spencer. Instantly attracted to Jane, Frank asks her out to dinner. However, Jane declines. After Frank leaves, Ludwig asks Jane to spy on Frank. At the police station laboratory, Frank and Ed Hocken meet scientist Ted Olsen. After Ted gives Frank the lab’s newest device, cufflinks that fire temporary immobilization darts, he informs the men that fibers from Nordberg’s jacket contained heroin. Frank insists Nordberg was framed, and Ed tells him he only has twenty-hour hours to clear Nordberg’s name. Later, Ludwig meets with Pahpshmir, a representative of a group plotting to assassinate Queen Elizabeth. When Ludwig agrees to do the job for $20 million, Pahpshmir asks how it will be done. Ludwig is able to control people by sensory induced hypnosis. To demonstrate, he uses a remote control that triggers a signal on the watch of his secretary, Dominique. After Ludwig turns the device off, Dominique has no memory of being controlled. Impressed, Pahpshmir agrees to pay Ludwig’s price. Later, Ludwig sends one of his henchmen to the hospital to hypnotize Nordberg’s doctor into killing the policeman. However, Frank arrives and stops him. As the doctor steals a car to get away, Frank orders a teenage student driver to follow, but the doctor dies after crashing into a gasoline truck, a missile, and a firework’s store. In the evening, Frank goes to his apartment and finds Jane Spencer. Over dinner, Frank shows her the photograph of the I LuvYou, but she does not recognize it as belonging to Ludwig. Afterward, Jane kisses Frank and they make love. The next day, Jane and Frank enjoy their newfound love until Frank leaves to stake out Ludwig’s office. Breaking in, Frank finds a note from Pahpshmir regarding his deal with Ludwig to assassinate Queen Elizabeth. However, Frank inadvertently sets the note and the office on fire. In the morning, the mayor reprimands Frank, who insists he found evidence that Ludwig was hired to kill the Queen. Not convinced, the mayor orders Frank not to attend the Queen’s welcoming reception at the Ambassador Hotel. Later, Jane tells Frank that Ludwig wants to meet him at the stockyards of the Ludwig Meat Packing Company. Frank reluctantly agrees. He arrives at the stockyard, but is ambushed by one of Ludwig’s henchmen. Frank kills the henchman by pushing him into a vat of toxic waste. Frank goes to the reception and tells Ed Hocken about a possible assassination attempt. Seeing Jane dining with Ludwig, Frank thinks she was involved in the set-up. However, Jane insists she was not. As the mayor and Ludwig welcome Queen Elizabeth with the gift of a vintage war musket, Frank believes Ludwig is aiming at her. He jumps on top of the Queen, embarrassing the police and the mayor. The following day, the mayor orders that Frank to be fired from Police Squad. As Frank cleans out his desk, Jane arrives and tells him she overheard Ludwig saying that while the Queen attends the California Angels and Seattle Mariners baseball game, one of the players will kill her in the seventh inning. At the baseball stadium, Jane, Ludwig and the mayor accompany the Queen to special box seats next to the field, while the squad covers all exits. Wanting to find a way onto the field, Frank pretends to be world-renowned opera singer Enrico Pallazzo, invited to sing the National Anthem. However, Ludwig recognizes Frank and orders nearby officers to arrest him. To hide, Frank knocks the home plate umpire unconscious and disguises himself again. During the game, Frank searches every player, but does not find any weapons. At the end of the sixth inning, Ludwig uses his remote control and signals Angels right fielder, Reggie Jackson. Hypnotized, Reggie finds a handgun under second base and walks towards the Queen. Jane yells to warn Frank, but Ludwig pulls a gun and leads her away from the field. Hearing Jane’s warning, Frank fires one of his dart cufflinks. However, he hits a woman in the bleachers. Temporarily paralyzed, she falls directly on Reggie Jackson, saving the Queen’s life. Frank follows Ludwig and Jane to the stadium concourse. Jane escapes by biting Ludwig, and Frank fires his second cufflink dart. Falling over the railing onto the parking lot asphalt, Ludwig is killed as a truck, a steamroller and a marching band flatten him. A band member steps on Ludwig’s remote control, and triggers a transmitter in Jane’s watch, activating her to kill Frank. As Jane aims a gun at him, Frank shows her an engagement ring and tells her he loves her. Hearing Frank’s declaration, Jane breaks free of the hypnotic control and agrees to marry him. Afterward, the mayor rehires Frank as a part of Police Squad. Nordberg arrives, awoken from his coma, and thanks Frank for clearing his name.