Dustin only now realizes he's lost his backpack with Cam's disc inside, but the kicker is that the Thunder Rangers have long had it and can now thwart the Power Rangers' every move.
Tori is transported to another dimension where the Rangers are evil. She teams up with Lothor and his forces to defeat the Rangers and restore peace to the city.
The Thunder Rangers continue to exhibit contradictory actions - attacking, rescuing, retreating - but eventually discover the secret location of Ninja Ops.
Journeying into the past, Cam encounters several revelations about his family at the academy while seeking a power to help the depleted Rangers in the present.
To break through Sensei's energy barrier, Thunder Rangers seek the Gem of Souls in the Mountain of Lost Ninjas, with Wind Rangers and the mountain's walking dead at their heels.
With the Ranger Zords destroyed, Lothor finally opens the Abyss of Evil and leads all his formerly defeated alien ninjas back from the dead to attack the Rangers en masse.
Though mortal enemies, Lothor and Vexacus strike a deal to work together for mutual benefit, and as Skyla's time grows short, she endeavors to be near Shane when it's her time to pass on.
With the Scroll of Destiny to guide him, Lothor finally brings about what he's desired most for a long time - the beginning of the end of the Power Rangers.
An illusionary master drains the Rangers of their energy before putting them in a dimension where they can't tell friend from foe. Cam makes a desperate move to save them all.