An experimental submarine with a very experienced crew, the "Siren II" is sent to find out what happened to the "Siren I" after it mysteriously disappeared in a submarine rift. Things go awry when they begin to find things that shouldn't be there...

Three women plot to catch wealthy husbands by throwing a party at a mansion to which they have temporary access. Obvious love stories follow involving an ex-ballplayer, a secretly wealthy mechanic and an ad exec.