In the deep night of "Happy City, Kumsu," a family moves in with a yellow van topped with a veterinary hospital sign.
An urgent situation arises, forcing the family to put their heads together and come up with a plan.
The fugitive incites Chairman Jo to threaten the family, while Ji-hoon tells Young-soo there's yet another problem to solve.
Detective Kang chases The Doom-veloper on his way to the animal hospital, while the villain sharpens his blade, ready to confront the family himself.
Let's start by catching the guy with the Special Forces tattoo.
The root of the family’s troubles began with "family planning". Now, they unite to solve the problem, but will it all go according to plan?