Kim Jeon-gu and Park Du-gi are creating a bird field guide together under the name ‘JEONGUDUGI’. Having observed almost all the birds that can be found in the country, there was still one bird they hadn't encountered yet... That is the rare species of the egrets, the ‘Waekguragi'.

While struggling to observe the Waekguragi, a peculiar-shaped wisdom tooth took root in Jeongu's mouth. At first, the wisdom tooth could barely be discerned only through an X-ray. Its presence was minor, but as it grew, it began to itch inside Jeon-gu's mouth. As Jeon-gu became increasingly uncomfortable with the troublesome wisdom tooth, she suddenly found herself observing Du-gi instead of birds. At that moment, a tip-off call came in claiming to have witnessed the Waekguragi.​