Baby-sitting the three Taylor kids isn't a job, it's a matter of survival of the fittest. They delight in terrorizing their newest sitter, explaining their secluded home is haunted by a ghost, and that an "ax murderer" has just escaped from jail and is heading their way. Adding confusion is a dizzy aunt, who pays a surprise visit; the dad's boss, whom the kids knock out thinking he is the escaped convict; the boss' domineering mother; and the sitter's offbeat boyfriend, who wants to "rescue" her. The kids lay a trap for the convict and bring about a hilarious climax that involves the appearance of the very ghost who is supposed to haunt the house.