A brain surgeon tries to end his unhappy marriage to spend more time with a disembodied brain.
Just before stubborn millionaire Edwina Cutwater dies, she asks her uptight lawyer, Roger Cobb, to amend her will so that her soul will pass to the young, vibrant Terry Hoskins – but the spiritual transference goes awry. Edwina enters Roger's body instead, forcing him to battle Edwina for control of his own being.
Private eye Philip Marlowe and his bride move to a desert town, where he uncovers a land scheme.