Horace & Tina are two three-feet tall "Nelfs". Grumpy and over 200 years old, Horace is the world's greatest mischief-maker, while his elder sister, 271-year-old Tina, is an incurable romantic who loves to meddle and give advice. When they fall into the life of 13-year-old Lauren Parker, she discovers she is the only person who can see them.