The marriage of Bart Rollins and wife, Loretta, has hit a new low. Late on a dark, foggy night, while returning home from a wedding, a figure steps from behind a large oak tree, off the curb and into the street, and is hit and killed instantly. Bart, due to his constant trouble from Loretta, has been drinking at the wedding throughout most of the day and night. In a panic, Bart envisions the crisis he faces: undoubtedly years in prison if apprehended. With no other cars in the immediate area and no witnesses in sight, he leaves the scene. The following week, Bart tells Loretta that he intends to end the marriage, at which point she informs him that if he ever tries to leave her, she, the sole eye-witness, will be quite happy to tell the authorities all about the hit-and-run accident. Three years later, Loretta, the owner of a successful business, employs several new employees including Kenton Allison, a handsome young man, nine years her junior. Kenton is married to the beautiful Claudia, a cardiac nurse, but in spite of the age difference, he and Loretta eventually fall in love. In the meantime, Kenton and wife Claudia become frequent house-guests of the Rollins’ and conversely, Bart soon falls for Claudia-a sort of crisscross situation, but neither couple is fully aware of the other’s activities. Claudia and Bart, a commercial artist and also a private pilot, find themselves in a quandary: the only barrier keeping them from a future life of bliss: the other couple, Loretta and Kenton. Finding themselves in a desperate situation and ever conscious of Loretta’s threat, they formulate a plan to do away with Loretta and Kenton: a plan intended and designed to make it appear that the couple have literally disappeared. Under the guise of providing the pair with flu shots, Claudia inoculates both with a deadly substance, after which Bart loads the bodies, one at a time into his plane, in the darkness of night he flies them out over a large body of w