Body Snatchers

A teenager, Marti Malone is travelling along her summer vacations with her father, Steve Malone, her stepmother, Carol Malone and her young stepbrother, Andy to a military base where her father will inspect some toxic products. Once in the base, she becomes friend of Jean, the daughter of the general in charge of the base, and the helicopter pilot, Tim. Soon Marti and her father see that people are acting strange.