| Director | Howard Morris |
|---|---|
| Genre | musical film |
| Country | United States |
| Box office | $1.2 million |
After performing in a concert, Donny and Marie Osmond head for the airport to catch a flight to Hawaii. At the airport, they wait for a telephone booth occupied by Charlie, who unbeknownst to them, is a member of a theft ring. Charlie is making a phone call to his boss, Wong, to inform Wong that he has retrieved a necklace Wong wants and to warn him that a man named Webster, who works for a Professor Kruse, also wants the necklace. As Donny and Marie wait for Charlie to finish his phone call, an attractive blond woman named Tricia approaches them. Donny flirts with her, but she has no interest in him. Meanwhile, Charlie sees Webster approaching and gives the necklace to Marie, telling her it is a gift to her from his church, and Tricia sees him do it. A few moments later, Webster corners Charlie and demands to know the whereabouts of the necklace, and Charlie denies having any knowledge of it.
Donny, Marie, their manager Sid, Tricia, Charlie, and Webster all board the plane, and during the flight to Hawaii Webster kills Charlie with a cup of poisoned water. After the plane lands in Hawaii, Wong's henchmen Mickey and J.L. discover Charlie's body, while Webster calls Professor Kruse to tell him that he believes that Charlie hid the necklace somewhere. Tricia asks Marie about the necklace, and Webster, Mickey, and J.L. all overhear their conversation and see that Marie is wearing the necklace.
Webster tails Donny and Marie out of the airport, and Mickey and J.L. recognize him. Mickey and J.L. begin to follow Donny and Marie's limousine, while Webster steals a car and tails them as well, but Mickey and J.L. force him off the road. Webster then steals a driving school′s car and continues his pursuit of Donny and Marie. He forces Mickey and J.L's car to crash, but in the process loses control of his own car and flips it over, suffering injuries that put him in the hospital. Donny and Marie remain completely unaware of Mickey, J.L., and Webster and the car chase and crashes taking place behind their limousine.
After Donny and Marie reach their hotel, J.L. poses as a deliveryman bringing flowers to Donny and Marie's hotel suite so that he can get their suite number. Donny sees Tricia in the hotel lounge and asks Marie to leave them alone, so Marie heads back to their hotel suite. Donny approaches Tricia and asks her out, but to his disappointment she suggests that Marie come along. Meanwhile, Marie returns to the suite to find Mickey ransacking it as he looks for the necklace. While Donny is walking Tricia back to her room, he hears Marie scream and rushes to their suite. He finds Marie fighting Mickey off and jumps in to protect her. Mickey flees and Donny pursues him out of the hotel, but loses him in a crowd of fans. Donny rejoins Marie, who says that she thinks Mickey was looking for her necklace, but Donny dismisses the idea. In response to the incident, Sid tells them that he will hire additional security to protect them. Wong arrives at the hotel, where Mickey and J.L. fill him in on what has happened.
Kruse and his henchman Ito visit Webster at the hospital, finding him bandaged from head to toe and unable to speak. To communicate with him, Kruse shows him a picture of Donny and Marie and tells him to wiggle his toes to answer yes-or-no questions about the picture. Meanwhile, Ito turns on the television, on which he and Kruse see Donny and Marie performing on a local television show and Kruse notices that Marie is wearing the necklace. At the television studio, Sid introduces Donny and Marie to Al, their new security guard. On stage, Marie notices Wong staring at her in the audience and becomes flustered, forgetting the lyrics to songs.
After the show, Donny and Marie return to their hotel, where Donny asks Marie what happened to make her forget the lyrics, and Marie again tells him that she believes that someone is after her necklace. Donny says that they should dispose of the necklace, but Marie wants to keep it and puts it in a jewelry box instead. As Donny leaves the hotel suite, Kruse and Ito check into the room next door and Wong, Mickey, and J.L. check into the room on the other side moments later. Alone in her suite, Marie hears noises and notices Kruse and Ito peeking through her windows, and someone steals her necklace. In the hotel's basement, Kruse, Mickey, Wong, Ito, and J.L. all sneak up on one another, then accuse each other of having the necklace. When they realize that none of them have it, they reluctantly agree to cooperate to find out who has stolen it from Marie.
In the hotel suite, Marie talks to a policeman, Lieutenant Alecki, about the theft of her necklace. Outside, Donny tells Sid that he stole the necklace because he thinks that Marie is merely imagining that gangsters are after it and that it is distracting her during her performances. Donny throws the necklace into the hotel's wishing well and returns to the hotel suite with Sid to find Marie with Alecki. Alecki tells Donny he found fingerprints on the jewelry box which will allow him to identify the thief. Afraid that he will be revealed as the thief, Donny talks Al, the security guard, into secretly returning the necklace. Tricia and Marie catch Al breaking into the suite, and Tricia subdues him with surprising ease. Donny returns and tries to convince Marie that Al stole the necklace, but Alecki calls Marie and tells her that the only fingerprints on the jewelry box are hers and Donny's. Marie realizes that Donny stole the necklace and is furious with him. Kruse hears from a contact he has at the police laboratory about the fingerprints, and Wong says that the theft was merely a ruse by Donny and Marie to throw him off the trail of the necklace.
The next day Alecki suggests Marie take the necklace to a local museum to have it appraised. She does, not realizing that the expert appraising it is Kruse.