The Last Leprechaun

Ethel and Tommy Barrick are away attending a boarding school and they miss their distant father a successful and powerful businessman. As summer arrives they are unhappily sent away to live with their father's new fiancee (Veronica Hamel) in Ireland. They soon discover that their future stepmother and her creepy butler (David Warner) are planning evil schemes with mysterious evil powers that they possess. With the help of a sympathetic housekeeper the children fight off the evil pair and try to understand their father to regain a family that they never had. (official distributor synopsis)