The wife of Brown (Colin Fields) died a year ago, leaving behind seven eccentric children. Brown, who is busy at work all day, has to deal with these troublemakers when he gets home. To this end, Brown hired 16 nannies before and after, but none of them could cope with these ghosts. To make matters worse, Brown's bossy aunt gave him an ultimatum to stop subsidizing the children's living expenses if he couldn't find another mother for them within a month. Brown, who is heavily in debt, is likely to end up in jail if he doesn't get financial support from his aunt. At this time, life is in a desperate situation. Just when Brown was feeling desperate, an extremely ugly woman appeared on his doorstep. The woman tells Brown that her name is Nancy McPhee (Emma Thompson) and offers herself to be the babysitter for the children. McPhee has such magical powers that no matter how the children plan to tease her, they will not succeed. Children's pranks sometimes even get retribution on themselves. Under McPhee's careful training, the children are getting better day by day, and Brown's situation is getting better, even the face of the magic babysitter is changing.