When some deep sea researchers feel their base being buzzed by a strange object, they assume it's a whale or some other natural occurrence Thing is, soon they realise that is a metallic object - like an aluminium sting-ray - and it contains extraterrestrial life that isn't that friendly. Now they are besieged and hundreds of feet under the surface with limited oxygen and a menacing foe. Can they escape? Well that's down to team leader "Wayne" (Scott Brady) who has, typically, to run a dysfunctional team of military and scientific brains who have baggage, of course, and seem to prefer fighting ...