Welcome to the hidden magical - and mysterious - world of gnomes, elves, and trolls. Eleven-year-old Sarah moves with her family from New York City to rural Hadley, Connecticut. She's eager to explore her new home and meet new friends, but she never expected to befriend an old garden gnome. Readers join Sarah as she is drawn into a secret world under our feet. Sarah uses her instincts to calm old rivalries and help the underworld elves, gnomes, and more join her in the upperworld.