Following an urgent trip to the Arctic, a scientist and his friend are quarantined with an illness that soon escalates into something sinister.

Michael continues to prowl for victims while Luther struggles with a traumatic loss and painful accusations. Also, Kaylee makes a connection.

Luther connects with a Washington insider who has a plan to keep society from collapsing. Ava sets out to get proof of the DNS internment camps.

An official truce is announced but complications quickly arise, threatening the lives of humans as well as Bloods.