In Seoul, Hwan dreams of having a dog. His wish takes an extraordinary turn when he meets Kai, a talking dog with a secret: he is a PotenDog, a dog with special powers. Kai reveals a hidden world where PotenDogs fight the evil Goldfang organisation.

The search for Cloud intensifies as Kai and Hwan follow her trail. The Goldfang's sinister plan unfolds, with Garrius discarding Wonton and tasking Draco with capturing more PotenDogs. The stakes rise when Kai encounters Marley and Bullet.

The Core-Net team faces a crisis as their headquarters is destroyed, forcing them to seek refuge in Hwan's apartment. The situation becomes chaotic when Hwan's parents unexpectedly return home, leading to hilarious attempts to conceal the PotenDogs.

The Goldfang's sinister plot thickens as Garrius reveals his plan to turn companion dogs into PotenDogs, exploiting their emotional vulnerabilities.

The Core-Net team races against time to protect the First Dog from the Goldfang's clutches. Meanwhile, Hwan grapples with Kai's harsh words and the realisation of his own loneliness.

The Goldfang's plan to create a PotenDog army takes a dark turn as they seize control of a dog pound. The Core-Net team reel from their encounter with Garrius, Kai struggles with his traumatic memories, and Hwan faces his bullies head-on.