Yoongi and Jimin are bored one night so they invite the guys over to play with an Ouiji Board. Things don't go as planned and someone ends up getting possessed.
Jimin needs to spend a lot of time with Tae, who is unhappy.
Yoongi feels abandoned and starts hanging out with Hobi a lot in the music studio, which makes Jimin jealous.
Jimin's distress affects his mental health badly and Yoongi is too busy being jealous to notice.