Zak Gibbs (JESSE BRADFORD) is a normal teenager who lives with his dad, George (ROBIN THOMAS), mom, Jenny (JULIA SWEENEY), and younger sister, Kelly (LINDZE LETHERMAN). When not hanging out with his best friend, Danny Meeker (GARIKAYI MUTAMBIRWA), or being upset that his father, a college science professor, pays more attention to his work and students than his kids, Zak constantly thinks about getting his dream car, a convertible Mustang.
There's also Francesca (PAULA GARCES), the attractive new student from Venezuela at his school with whom he's instantly smitten, although the feelings aren't initially mutual. Yet, he eventually wins her over and goes to visit her at her home where she puts him to work. It's there that he accidentally activates a watch he found at home that one of George's former students, Dr. Earl Dopler (FRENCH STEWART), had sent him to research.
It seems that the watch accelerates its wearer and anyone they're touching to such an accelerated rate that everyone and everything else around them appears to come to a near frozen standstill. Dopler had been working with Henry Gates (MICHAEL BIEHN) at QT Laboratories in conjunction with the NSA, but now wants out, particularly since his and Gates' experiments have left him prematurely aged.
Not knowing this, Zak and Francesca pull several pranks on various people by physically moving them or altering their surroundings while "frozen." They then call it a day, but upon returning home, Zak discovers Gates' minions in his house, snooping around. After a close call with them, he then escapes, meets Dopler and then gets help from Francesca as he sets out to find his father who he hopes will be able to help them.