When twins Lindy and Kris find a ventriloquist`s dummy in a Dumpster, Lindy decides to "rescue" it, and she names it Slappy. But Kris is green with envy. It`s not fair. Why does Lindy get to have all the fun and all the attention? Kris decides to get a dummy of her own. She`ll show Lindy. Then weird things begin to happen. Nasty things. Evil things. It can`t be the dummy causing all the trouble, Can it?