Arthur is a spirited ten-year old whose parents are away looking for work, whose eccentric grandfather has been missing for several years, and who lives with his grandmother in a country house that, in two days, will be repossessed, torn down, and turned into a block of flats unless Arthur’s grandfather returns to sign some papers and pay off the family debt. Arthur discovers that the key to success lies in his own descent into the land of the Minimoys, creatures no larger than a tooth, whom his grandfather helped relocate to their garden. Somewhere among them is hidden a pile of rubies, too. Can Arthur be of stout heart and save the day? Romance beckons as well, and a villain lurks.

Pong is a high-school geek who belongs to a group of high school outcasts known as the “Invisibles”, and enjoys letting his imagination run wild by drawing cartoons. May-Who is also one of the “Invisibles” and has an extraordinary secret: an ability to discharge electricity like a Tesla coil. Whenever her heart beats faster than 120 beats per minute her body releases a powerful electricity charge. Pong accidentally learns about this and promises to keep it a secret in exchange for helping each other win over their own high-school crushes.