Zoey meets up with her brother, who shows off a dinosaur fossil he believes comes from a new species called the Vulturesauros. Zoey's brother's arm is in a sling, he injured himself climbing the peak of the mountain where the fossil is located. he is eager to use it to earn his scolarship. He leaves the fossil in Zoey's care, but she accidentally ends up disintegrating it back at Grid Battleforce when she fails to read the label on one of Nate's liquid containers and mistakes the substance for something else
Zoey tells her brother what has happened, he is heartbroken. Zoey decides to climb the mountain and retrieve a replacement fossil.
Evox uses the morph-x to restore himself to full strength, he gives Roxy a telling off for her constant failures. Roxy reads the headlines about the Vulturesaurus and decrees that it's DNA is what she needs to defeat the Rangers. Scrozzle pinpoints the Vultursaurous location, and also picks up Zoey's GB signature. Roxy awaits Zoey atop the mountain, and takes her DNA scanner. The remaining Rangers bail Zoey out and fend off Roxy's forces, but she escapes. Zoey grabs a fossil before they head back.
Roxy uses the dinosaur DNA to upgrade herself, but it puts a great strain on the robo-maker and it short-circuits, putting it out of commission. Without it, Roxy and Blaze can't be brought back if they are destroyed again by the Rangers.
Blaze and Roxy do battle with the Rangers in the city, Roxy uses her power to grow big. The Rangers defeat her for good with the Beast X King Ultrazord. Devon, occupied fighting Blaze, overhears a conversation between Scrozzle and Blaze about the robo-maker, and how they can't bring back Roxy. He tells the remaining Rangers this at the juice bar. Zoey hands the fossil over to her brother, who tells Zoey not to risk her life for something like this again, they give each other a hug. Devon's hot dog is taken by a dog being taken care of by Ben and Betty. They find the dog in it's kennel putting the ketchup sauce on the sandwich, it proceeds to squirt the ketchup all over Ben and Betty
Crunch Time
Spoiler:
Blaze returns early from a karate competition and hands the Rangers a piece of Robo-Roxy's hard drive containing crucial data about Evox regaining his full strength and putting together his Gigadrone for a full assault on the city.
Evox deploys Railtron to provide a distraction for the Rangers. During the battle, Blaze joins them and fends off Railtron's forces, injuring his arm in the process. Devon arrives with Cruise, a little late to the fight. Railtron is destroyed. Blaze is angry at Cruise and tells Devon he needs to be tougher on his team. Devon agrees with Blaze and gives Cruise a telling off.
Back at Grid Battleforce, Blaze proposes that the Rangers lure Evox's gigadrone intro the GB hanger and then trap him inside the base. The Rangers agree to the plan, but Cruise is uncertain. He is ignored by Devon.
Back at his lair, Scrozzle tells Evox his Omegadrone is complete, Evox is delighted..soon he won't have to hide any further secrets from the Rangers. Scrozzle is confused, Evox tells him he has a 'very dark past'.
After Ben and Betty briefly become trapped in the containment field intended for Evox, the Rangers are called to action as the Omegadrone descends. The Rangers use the Zords and, per Blaze's plan, lure the Omegadrone into the hanger. The Omegadrone causes a lot of damage and Cruise in particular takes the brunt of it. The Omegadrone is eventually destroyed and Evox is captured. Devon apologises to Cruise.
Later, the Rangers visit Evox in his cell, Devon argues with Blaze, telling him he was wrong to be so dismissive of Cruise. Devon receives a communication from Blaze...he's at the karate competition, the Blaze working with the Rangers was Robo-Blaze the whole time. Robo Blaze teleports out while the Rangers ponder what Evox's true plan is