A group of cruel, arrogant guys discover an experimental transformation device inside the private research laboratory of one of their fathers, a brilliant scientist working on advanced body-modification technology. Despite being strictly forbidden from touching the equipment, they steal the device and take it home, eager to see what it can do.

The device can gradually rewrite a person's body to match a selected reference image. The guys choose a picture of a gorgeous blonde woman wearing a sexy pink princess dress, white gloves, and a blue gemstone necklace. Seeing an opportunity for the ultimate prank, they decide to use the device on their next unsuspecting victim.

The transformation happens one stage at a time. First, the victim's clothes change into the pink princess outfit. Then the feet, legs, hips, waist, and body gradually reshape into feminine proportions. Finally, the face becomes beautifully feminine, the hair grows long and blonde, and the voice changes until the transformation is complete.

Throughout the process, the guys laugh, tease, and argue over the results, treating the experiment as their own private entertainment. However, the device requires an authorization code to reverse the transformation, and none of them knows whether the code their father uses will even work.

What begins as a reckless prank soon spirals out of control. As the victim's transformation progresses, the guys become increasingly invested in their creation, and their motivations begin to differ. Some see it as a hilarious joke, others become fascinated by the results, and one starts wondering what else the device might be capable of.