Jennifer is a lovely teen who has been hired to baby-sit the kids of Harry Tucker and his wife, Dolly. The Tuckers go to a party and proceed to get inebriated, with Mr. Tucker fantasizing about his beautiful baby sitter. Meanwhile, Jack, her boyfriend, and Mark, another guy interested in her, decide to spy on Jennifer at the Tucker house, with each young man also fixated on her.

A passenger train has been hijacked by an electronics expert and turned into an untraceable command center for a weapons satellite. He has planned to blow up Washington DC and only one man can stop him, former Navy SEAL Casey Ryback.