Hyojeong's family is a vibrant household where three generations, including
grandmother, grandfather, mom, dad, protagonist Hyojeong, younger brother
Hyoji, and youngest sister Hyori, live together.
Everything begins when one day, Hyojeong's grandfather discovers an owl
statue at an old site and brings it home. In the past, the ancient people sealed a
demon that harmed humans using the “Unstable Orb” of negative energy
within the owl statue.
Unaware of this, the grandfather brings the owl statue home, and the youngest
Hyori inadvertently unseals it, falling for the trick of the little demon “Maak.”
The released Maak hides unstable stones around the world, using these stones
to turn the human world back into a world of chaos in hopes of becoming a
recognized official demon from a little demon.
Hyojeong begins a great adventure with Hyoji, Hyori, Hyomong, and Puppu to
seal the demon released by Hyori's mistake, prevent the impending crisis in the
human world, and restore peace to the world.