When eight researchers at Tsalal Station suddenly disappear, Danvers orders a search but tempers expectations of finding the men. Navarro tries to convince Danvers that the men’s disappearance is connected to the murder of Annie Kowtok, a case that has long gone cold.

As Danvers and Prior set out to learn more about Tsalal – and find an unlikely location for the physical evidence – Captain Connelly threatens to move the case to Anchorage.

While Hank leads the search for Clark, Prior asks Danvers about the murder-suicide case that drove a wedge between her and Navarro.

When Julia's mental health struggles resurface, Navarro brings her to a local facility, promising that this time will be better.

As Prior digs into the links between Tsalal and mining company Silver Sky, Navarro rescues Leah from a local protest that has turned violent.

In the midst of a brutal storm, Danvers and Navarro find themselves stuck at Tsalal with no electricity or means of contact.