Stay Out of the Basement (1)

Margaret and Casey Brewer's father has recently been fired from his job at a laboratory, where he works as a botanist. Now, he spends all of his time locked downstairs in the basement, working on experiments, and when Margaret and Casey go down there to check it out, he yells at them never to go inside again. However, when they do take a closer look, home alone, they find that their father is growing plants that may have minds of their own. And when a vine grabs Casey and nearly pulls him into the basement, Margaret and Casey realize that the plants may literally be alive...