Josie and Ayla return home after an eventful Halloween night of trick-or-treating, concluding their adventure at the peculiar residence of an eccentric elderly scientist. To their surprise, he gifts them each a bag of candy. Sitting on the living room couch, the two friends contemplate whether to indulge in the candy. Josie, with a fearless spirit, eagerly dives into the sweet treats, much to Ayla's caution, who fears the scientist's concoction.
s Josie savors the candy, a peculiar sensation courses through her body, causing her to undergo an astonishing transformation. Her physical form rapidly expands, with her feet, legs, and belly steadily growing, ultimately causing her to burst through the roof. In her colossal form, Josie nonchalantly strides through the city, marvelling at the world from her newfound towering height. Ayla, left behind, watches in awe before deciding to partake in the candy's magic herself.
In no time, Ayla, too, experiences a massive growth spurt, turning into a gigantic figure. The two giantesses discuss their newfound colossal stature as they peer down at the miniature city below. Josie once again feels the tingle and starts to grow even more, reaching MEGA proportions. Ayla follows suit, and the two MEGA giantesses gleefully stomp through the city, causing destruction with each step. The candy's power continues to work its magic, propelling the giantesses into an even more colossal size, eventually surpassing the size of the entire planet.
Now hovering over Earth's hemisphere, they revel in their immense power, giggling as they consider their next nefarious actions. Josie devises a sinister plan, using her finger to obliterate a random country with a devastating atomic blast. The giantesses take sadistic pleasure in the destruction, fully aware of the millions of lives they've erased. Ayla, not to be outdone, conjures a colossal hurricane, unleashing it across the Earth's surface.
Their malevolent actions know no bounds as they continue to grow, eventually reaching a size where they hover over entire planets in the solar system. With insatiable appetites, they each choose a planet to devour, their evil reign showing no signs of abating.