Lee Sang-min

An incident unfolds when a film crew goes to a reservoir to update the road view where an unidentified figure was filmed, and they encounter something in the dark, deep waters.

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.

Cheol-gyu, who is living a successful life, is visited by his old hometown friend, Young-hun. Young-hoon, who is about to get married, asks Cheol-gyu to be HamJinabi. Cheol-gyu hesitates at the request of a friend who has not contacted lately. But… The marriage partner was Soon-i .Hearing the name 'Soon-i', Cheol-gyu feels that he cannot refuse the request. He goes to the bride's house to be a hamjinabi with his friend 'Nak-gyun'.

Hyeon-gyu, who was injured and fell into an administrative soldier while learning the motion of "spinning gun" at the honor guard, wants to become a member of the honor guard again and run the event.