Thanks to a dousing in a top-secret chemical from an overturned truck, teenager Alex Mack is given amazing powers that make her the envy of her sister and best friend... and the target of a search by the chemical company, which wants to find her at all costs.
Alex, Raymond, and Nicole are facing their first junior high school midterm in history class. Libby, the most popular girl in school, has her own ideas about surviving the midterm and studying isn't one of them. Libby decides to pull the fire alarm right before the exam.
Alex and Ray have a falling-out and Alex is afraid Ray will disclose her secret to the plant.
In anger, Alex jeopardizes her mom's job. Later, she tries to make it up to her.
A reporter from the Planet newspaper comes to the Macks' house to do a story; Alex's cold makes her powers go haywire.
Annie considers going away to school. Meanwhile, Alex's powers are going haywire and she must convince Annie not to go.
Alex uses her powers to save Ray after he freezes at a school music recital.
