The survivors arrive on an uninhabited ship floating billions of light years away from Earth. Panic spreads throughout the group and Col. Young, who was severely injured during the escape, transfers command to Lt. Matthew Scott, before lapsing into unconsciousness. Teams led by Dr. Rush and Sgt. Greer try to make sense of the situation, while Lt. Tamara Johansen, a medic who was days away from leaving the program, is thrust into the role of chief medical officer.