The dynamic between the three leads—Sung-joon, his judge brother Sung-hoon, and social worker Jo Eun-gi—becomes increasingly strained.

This episode is pivotal as it transitions the series into a "clear your name" thriller, humanizing its leads while maintaining a gritty, suspenseful atmosphere. Blind – K-Drama Episode 4 Recap & Review

The episode deepens the mystery surrounding Hope Welfare Center. It is revealed that characters like Ki-nam and Moon-kang are investigating the connection between recent murders and the facility. This backstory introduces a layer of societal commentary, suggesting that the current violence is a direct consequence of historical abuse and the "blindness" of the system that failed vulnerable children. Fragile Alliances and Suspicions

: Despite finding evidence that seems to incriminate his brother, such as a missing earring in Sung-joon's car, he begins to suspect that Jung Man-chun might be innocent of the copycat murders.