Betty Joyce Foster is babysitting when she looks into the window of the neighbors and witnesses the man of the house in an argument with a much younger man. She sees the older man strike the younger man from behind, possibly killing him. Sam and Jim investigate the neighbors, Mr. and Mrs.AAnderson, after Betty Joyce calls them, but no evidence of foul play is found and the girl is found to have a very active imagination. Shortly thereafter, the body of another young girl is fished out of the ocean, and her boyfriend, who's wanted for questioning, is missing, followed by the disappearance of Betty Joyce. As it turns out, all three incidents are connected, and Sam and Jim arrive at the conclusion that the nice older couple, the Andersons, really aren't that nice after all.