Kay Dalton approaches Mike Nelson asking him to give her scuba diving lessons. She's heard that he's the best around and she wants to learn only for the best. She assures Mike that she's a good swimmer and is keen to get on with the lessons. From the first time they go under the the surface, Mike realizes that she's not only a poor swimmer but is actually afraid of the water. When he's approached by an insurance investigator he realizes what Dalton is actually up to.
—garykmcd