Upon confirming Yoon-young's alibi, Tae-heon hits a dead end, forcing him to reevaluate the investigation from scratch. Meanwhile, Woo-jae learns about Tae-heon and Jung-won's former romantic involvement and cautions Tae-heon against revisiting it. Jung-won, following an unpleasant three-way session involving Woo-jae and Yoon-young, realizes she's being followed.
