Seo-ha suspects Young-ho may have a hand in a recent tragic murder. An age-old conflict between chief detective Park Sang-min and Sung-jun surfaces.

Young-ho receives an ominous warning about a family burial ground and runs after Seo-ha. Sang-min hastily orders a search of Young-ho's home.

Seo-ha's attempts at intimidating Young-ho go awry. Sung-jun and Sang-min track down a stranger who may be connected to the killings.