Los Angeles, California, attorney Roger Cobb finishes a long day at the office to play guitar with a jazz band. On the morning of his thirty-eighth birthday, Roger suggests to his longtime girl friend and the daughter of his boss, Peggy Schuyler, that they get married. However, Peggy questions his readiness. Later, Roger visits his blind band mate Tyrone Wattell and informs him he is quitting the group to focus on law. Elsewhere, millionaire Edwina Cutwater learns that she has less than a week to live, and she telephones her attorney, Burton Schuyler, Roger’s boss. In the office, Roger asks Burton for more serious cases and demands a partnership. Ecstatic that Roger is finally committed to his career, Burton places him in charge of Edwina’s affairs. Roger arrives at the Cutwater estate as Edwina plans a lavish party, and is surprised to learn that she intends to return from the dead. Edwina introduces Roger to her spiritual advisor, Prahka Lasa, and explains that poor health has always prevented her from enjoying her wealth. She asks Roger to amend her will, leaving everything to her stableman’s daughter, Terry Hoskins. The beautiful, young Terry clarifies that her soul will be “transmigrated;” when Edwina dies, her soul will relocate to a sacred bowl before entering Terry’s body. Roger questions Edwina’s sanity and points out that her will can be contested, but Edwina insists that Roger leave. Downstairs, Roger accuses Terry of performing a ruse, but the girl assures him that she is uninterested in Edwina’s $20 million fortune. When Roger arrives back at the office, Edwina is there with her entourage, dictating her new will to Burton. Roger attempts to apologize, but Edwina informs him that he is too late to save his job. Roger berates her, so Burton escorts him outside, admitting that Edwina is crazy. However, he compliments Roger on his passion and asks him to be his divorce lawyer in return for a partnership in the firm. To celebrate, Roger asks his secretary to book his friend, Tyrone, to perform at Edwina’s party and be paid $1000. Back in the conference room, Edwina sees a white light, Prakha Lasa begins to chant, and Edwina’s soul passes into the bowl. In the commotion, the bowl is accidentally knocked out the window and falls on Roger’s head as he exits the building. While Roger wonders what is happening to him, Edwina realizes she is still alive. Looking into a mirror, Roger sees Edwina’s reflection and the two realize that her soul has entered his body. As Roger controls the left side and Edwina the right, they awkwardly attempt to walk. Edwina insist they go back to the law office to find Prahka, but Roger must first use the men’s room, where Burton’s partner, Mr. Mifflin, overhears Roger arguing with Edwina, possessed by her spirit. Mifflin warns Burton that there is something strange about Roger. Meanwhile, Terry believes the transmigration was a failure and informs Roger that Prahka left immediately after Edwina’s “death.” Before Roger can leave to find Prahka, Burton insists on discussing the intimate details of his divorce, and Edwina overhears from inside Roger’s consciousness. Back at Roger’s office, Peggy overhears her lover fighting with Edwina. Peggy accuses Roger of having an affair and berates him for representing her father in her parents’ divorce. He claims he has no choice and she breaks up with him. Later, Roger attends Edwina’s memorial service and is the only mourner. He falls asleep in the church, but is awakened at midnight by Terry. As Edwina continues to sleep inside his mind, Terry asks Roger to make love to her and they return to his apartment. Just as they are to consummate their passion, Edwina wakes up, appalled by their lust, and Terry flees. Roger stays up all night preparing Burton’s case while Edwina rests. In court, Roger falls asleep and Edwina takes over his identity questioning Burton on the witness stand. Although she finally wakes Roger, the case unravels, the judge fines Roger and throws him out of the courtroom, and Burton fires him. Meanwhile, Terry pays a taxicab driver to take Prahka Lasa to the airport and insure he gets on an airplane back to Tibet. Roger races to Edwina’s funeral, but is disappointed when Prahka is not there, and Terry feigns ignorance of the swami’s whereabouts. Edwina is touched that Roger arranged for a New Orleans-style “jazz funeral,” led by Tyrone. Afterward, at the hotel, Terry attempts to seduce Roger to distract him from looking for Prahka. Edwina, however, refuses to go through with their lovemaking. Roger convinces Edwina, in his consciousness, that making love is one of the great human experiences, but they are interrupted when Prahka unexpectedly returns. As Prahka prepares to conduct the transmigration ceremony, Terry admits she never intended to go through with it and plans to spend her $20 million inheritance while living in Edwina’s mansion. Edwina requests that Prakha release her soul to give Roger his freedom, but the attorney refuses the offer and insists they work together to stop Terry. At the Cutwater estate, Terry orders her father, Fred, to move his things into the main house from the stables, but he is disgusted by his daughter’s deception, and refuses. Meanwhile, the orchestra Roger engaged for the event arrives, and Roger disguises Prahka as one of the musicians. Discovering the joy of playing guitar, Edwina encourages Roger to quit law and focus on being a musician full-time, but he laments that he is unable to do so. Roger takes Prahka to the stables, where he transmigrates Edwina’s soul into the sacred bowl. When Terry returns from a horseback ride, Roger grabs her, but the horse kicks the bowl into the air and Edwina’s soul enters a bucket of water. As Prahka attempts to fix the dented bowl, Terry sends two security guards after Roger. During the pursuit, Roger transfers the water into a pitcher and entrusts it to Tyrone for safekeeping. Roger then refills the bucket with regular water and leads the guards on a further chase. Terry, however, retrieves the pitcher from Tyrone and dumps the water into a flowerbed. Later, during the party, Roger learns that Tyrone drank the water in the pitcher and Edwina’s soul is inside him. Prahka then transmigrates Edwina’s soul back into Roger. After the party, Roger, Prakha, and Tyrone sneak into the house, and are confronted by Terry, who leads them at gunpoint to a guest room. There, Terry is surprised to find Burton Schuyler with his lover, and the gun accidentally discharges. Roger wrestles the gun from Terry, and Burton telephones the police. Fred arrives and explains that this would be his daughter’s third conviction, and Terry insists she would rather kill herself than return to prison, but she offers Roger a deal. In the morning, Prahka transmigrates Terry’s soul into a horse and Edwina’s soul into Terry’s body. Later, Roger makes love to Edwina in her new body. Roger announces that he has given up law for music and he and Edwina dance to celebrate their new lives.