Our Story Begins As Zack is practicing for his upcoming dance contest at the Angel Grove Youth Center, Bulk and Skull start hounding him about losing and implant seeds of self-doubt in Zack's mind and heart.
Meanwhile, Rita Repulsa & Nyanma is calling forth the ultimate in monsters & and Time Shifter she has summoned The Giant Golem Time Shifter Know As Moah —the mutant warrior Mutitus and the spirit warrior Lokar. Goldar realizes that his Empress is planning to destroy the Power Rangers with their own worst fears by sending them to the Island of Illusion in a remote dimension.
Back at the Youth Center, Zack is challenged by Bulk to a dance-off but Bulk ends up embarrassing himself, as usual—but it still doesn't make Zack feel any better, so he leaves the Youth Center to think about some things, while up on the moon in Rita's Moonbase, Rita realizes that doubt is in the Black Ranger's mind. She casts another incantation and summons an unearthly storm to Angel Grove. When the Power Rangers realize what's happening, they contact Zordon, and he tells them that an unfamiliar energy is being summoned by Rita. The Rangers start rushing out of the Youth Center to look for Zack, but Tommy realizes that two karate students he had been mentoring are frightened of the unnatural phenomenon, so he stays behind to watch them.
Meanwhile, the rest of the Power Rangers find Zack in a secluded area of Angel Grove Park, just as Putties start attacking. The Rangers manage to hold them back until Goldar and Scorpina show up. The Rangers morph and attack the twosome, but the villains thrash them considerably. This gives Rita enough time to chant her final incantation, summoning the giant Mutitus. The Rangers summon the Megazord and fight the monster. They have the chance to destroy him, but then Rita appears on a fire escape. Then, a giant fireball streaks through the sky and transforms into a giant spirit head. This is Lokar, the other monster Rita has summoned.
Back at the Youth Center, Tommy gets a call from Zordon & Aura, and after making arrangements with Ernie for him to watch the two boys, he runs off to help his team. Back at the battlefield, Lokar has just used his Breath of Doom to mutate Mutitus and increase his power. Mutitus blasts the Megazord & Moah-Con Uses His Lava Blast To Overcharge Kirinda with stronger energy, and it looks like the Rangers are done for, until Tommy shows up and summons Dragonzord. The Megazord joins Dragonzord in the fight against Mutitus, but then the mutant monster incapacitates the Zords with toxic foam. Then, as the Rangers evacuate the Zords, Lokar opens a portal to the Island of Illusion dimension. At the Command Center, Alpha 5 is panicked at the fact that the Power Rangers have disappeared into another dimension, and Zordon tells him that his chosen ones are beyond his reach, and only their individual self-confidences can help them escape.
When the Rangers land on the island, they realize that their communicators and Morphers have mysteriously disappeared, and they start exploring the island, each of them realizing that they are all afraid that they may never get back home. A few minutes into their exploration, they hear some tuneless flute music, and realize that a little man is playing a panpipe. When Kimberly tries to explain that Rita sent them to this island, she doesn't get to finish, as the little man—who reveals himself to be named Quagmire after about a minute of poetry—tells her he is not a friend of Rita's and vanishes.
Then, Goldar's image appears in the sky, taunting the Rangers that they would soon lose more than their powers before this day was over, and then, five monsters the Rangers have previously battled and destroyed appear—Pudgy Pig Along With Change-Con, Eye Guy Along With Dipper-Con & Lynx-Con, Snizzard Along With Artie-Con & Wing-Con, Pineoctopus Along With Batterball-Con and Shellshock Along With Plumella-con. The Rangers prepare for a battle that they know they cannot win without their powers, but then, just as they come near, the monsters mysteriously vanish. The Rangers wonder where they are, and Goldar taunts them that the only thing real in this dimension is the danger. Zack's fear and self-doubt grow considerably, and he takes off down a path, only to come face-to-face with a giant python. However, when the other Rangers hear Zack scream, they realize that he is screaming at something only he can see. Billy deduces that Rita is trying to destroy each of them with their own individual self-doubts and fears. On this note, Zack starts gradually fading away, and Quagmire tells them in verse that Zack's own worst fears and self-doubts are causing him to fade. Jason urges Zack to fight Rita & Nyanma's spell, but it is useless. The episode ends when Goldar taunts the Rangers with the fear of ceasing to exist, one by one.