The Venjix Computer Network is attempting to conquer and lay ruin to the entire planet, and the human race has retreated into the environmentally shielded domed city of Corinth to protect itself from destruction. There, an elite force of Rangers is assembled in order to protect the city and battle the attacking machine army bent on world domination.

As Venjix grows stronger, it becomes clear that the Rangers need more than three operators to defend the city. Summer suggests that Dillon be the new Black Ranger, but with him part-machine and part-human, no one knows what side he's really on.

When Ziggy is charged with finding the new Green Ranger, he finds the perfect candidate in Tenaya 7, until he realizes she's a machine working for Venjix!

Scott is flooded with memories of his brother when he returns to Marcus' crash site in order to retrieve an over thruster core the Rangers need for the new Megazord configuration.

While attempting to overcome a power problem with the Rangers' new zord configuration, Doctor K is haunted by memories of her childhood being held at the "Alphabet Soup" think tank and a terrible mistake for which she has tried to make up for.

Dillon has a dream about his past when the Rangers are called into action. Venjix sends multiple monsters, wearing the Rangers down, and Dillon must make an important decision when he confronts the monster that has his stolen memories. He decides to keep his new memories and forget everything.

Dillon seeks to find more about his past by traveling to Omega City with the other Rangers in the GO-ONGER vehicle. They are sidetracked when Venjix downloads himself into a Generation 13 Attack Bot. When things look bad for the Rangers, two new and unknown Rangers appear to help. They then disappear, leaving the five Rangers in wonder of their identities.

The Rangers arrive at Omega City only to discover it was all a trap set by Venjix. In the midst of trying to escape, they are ambushed and overwhelmed by Venjix forces, but are saved by Rangers Gold and Silver who, this time, fight off their assailants in person. The seven Rangers then return to Corinth, where Rangers Gold and Silver finally reveal themselves as Gem and Gemma, long lost friends of Dr. K from the Alphabet Soup facility.

Scott decides to join Gem and Gemma in a more offensive approach in the battle against Venjix. Colonel Truman defaults to his usual "defend the city" tactics and ends up trapping everyone inside while a Venjix bot sucks all the air out of the city. The remaining Rangers make a deadly escape from Corinth and regroup with Scott in order to save the city.

The Rangers must return to the factory where the doomsday device is being built. Dillon attempts to find his sister before it's too late. Dillon discovers that he, Summer, Gem & Gemma are in his sister's cell. Summer finds the key that belonged to Dillon's sister at Venjix factory that matches Dillon's key.

In an effort to impress his father, Scott makes a reckless trip out to the wasteland. He and Gem stumble upon human prisoners and their field trip turns into a rescue mission. Venjix test-drives his new and improved robotic form. His new body doesn't hold up very well against the Rangers. Scott talks to Dillon about the Venjix Prisoners Camp where humans are infected with the Venjix virus, and Grinders make human hybrids like Dillon, his sister & the other at the Venjix Palace.

A Chemical Attack Bot attacks the city and puts all men fast asleep. Now, the women of Corinth, led by Summer, all have to work together and save the day. Dr. K works on an antidote to awaken the men of Corinth City.

Untested technology is found in an Alphabet Soup dumping ground. Colonel Truman tries to keep the technology from Venjix and comes across a video log that pins Dr. K responsible for the start of Venjix. Colonel Truman wants to arrest Dr. K. but if he does, then she wouldn’t be able to help the Rangers with the dangerous Paleomax technology.

It dawns on Dillon that the two keys to his musical pocketwatch fit together to play another tune -- the same one that Tenaya 7 whistles. Tenaya 7 is hit by memories of her past. She does some investigating on her own and finds out what really happened to her. Dillon finds out Tenaya 7 is his long lost sister.

Venjix’s end game is about to reveal itself. Every Attack Bot has been a calculating step closer to his plan. The city is filled with hybrids just like Dillon. Venjix is going to activate them all and Corinth will be brought down.

When the magnetic blast goes off and all the electricity goes out in Corinth, Venjix moves to take the city.

The Rangers race to insert a virus into Venjix before he takes over Corinth.