When Laura Dent visits Mystic Myrtle, the fortune teller confides that she is a fraud, and that she hates her husband Hubert.  Meanwhile, Laura’s husband Lionel, an insurance agent, is having an affair with Laura’s sister Joyce.  Joyce wants Lionel to divorce Laura and marry her.  Hubert discovers the affair and threatens to tell Laura unless Lionel produces an insurance policy designed to benefit him when Mystic Myrtle dies. 
Set in the 1950’s, one way or another each of them has a motive for killing one of the others. Who kills whom and how?