Sinbi Apartment: Halmeoniui Sowon, Bug-eseo On Mildong-gwi

As Christmas approaches, Hari and Doori encounter an elderly woman who still carries a deeply personal wish connected to someone she lost long ago. Around the same time, a strange dumpling-shaped ghost known as Mildonggwi begins appearing, its presence tied to memories that have never truly faded.

What first looks like another supernatural disturbance gradually reveals a sorrow rooted in family, separation, and a promise left unfinished. With Shinbi's help, the siblings must uncover the truth behind Mildonggwi and find a way to answer an old woman's wish before Christmas passes.