Hui Ju confronts a figure from her past who wishes to reveal what she knows. She then embarks on a retreat with Sa Eeon — who becomes possessive of her.

Sa Eon and Hui Ju's relationship shifts after her harrowing rescue. Determined to catch the kidnapper, Sa Eon goes full force — with the help of 406.

As Hui Ju and Sa Eon grow closer, the threat from the kidnapper intensifies. Sa Eon discovers an ominous and shocking clue from a past figure.