Fallen into Hikara - S1.E27

Erin starts to have dreams about a place filled with thick mist, and that her mother Soh-yon was being taken into "Hikara" the bad side of the afterworld. While Erin falls asleep next to Lilan, Soh-yon tells Erin that the mist in her dreams are an image of her hesitation and how she is lost in her feelings of sadness. With Joh-on and Soh-yon's encouragement (in her dreams) she vows to work harder after she wakes up.