Major Cage was trained with army to defeat the alphas. Alphas were black and roared. Cage was scared of blood so he didn’t want to go but the general said he has to go.

During the battle he killed an alpha; as it shivered, they all turned blue, then normal, but the special ones with the omega remained the same. One of them tried to kill cage but he killed the alphas first then he died. It all repeated. This time he was in a jungle and saw the power-source of the alphas and destroyed it. The aliens were dead.