Alan and Julia travel to an abandoned satellite station in a last-ditch effort to call for help. Once there, they come across the truth behind Hatake's plan and Julia's condition. Meanwhile, Dr. Jordan makes a startling discovery of her own, which could mean a cure for cancer.

Peter leads the Vectors in a desperate final attempt to spread the virus, while the CDC scientists work together and successfully create a cure just as their lives come under threat from Ilaria Corporation's deadly mercenaries.

Alan, Walker, Hatake and Daniel set a trap for an assassin who has been sent by Ilaria to retrieve both the virus and the cure.