Locked in a fierce battle with Venomark, the Rangers are bitten by the venomous mutant... except for Wes, the Red Ranger, who runs to his father's lab for the antitoxin. Saved by the serum, the Rangers, Q-Rex and Shadow Force Blue defeat the vicious Venomark. Jen warns Wes that his Dad's serum must be destroyed, or the future could be in danger of shifting...