Kim Hee-jung

When the app is launched, a ghost appears. Developed by four young adults, the app becomes the centerpiece of a livestream where they venture into a supposedly haunted mountain to prove its authenticity—only to meet a grim fate.

It seems to be a harmonious and happy family gathering. Conversations that begin with lighthearted jokes gradually uncover long-standing conflicts. Despite everyone's efforts to resolve and improve their relationships, the discussions only grow increasingly complicated.

Ji-woo, an outcast at a prestigious private school, meets Hak-sung, the school janitor who is actually a mathematical genius who defected from North Korea.