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...

Jack Scalia
as Wick Hayes

R. Lee Ermey
as Captain Phillips

Ray Wise
as Robbins

Deborah Adair
as Lt. Nina Crowley

John Toles-Bey
as Joe Kane

Ely Pouget
as Ana Rivera

Emilio Linder
as Philippe

Tony Isbert
as Fleming

Frank Braña
as Muller

Edmund Purdom
as CEO Steensland