Humanity remains trapped at the top of an isolated apartment tower but now has one hope of escape. Jackie, now a member of mankind's final Scavenger team, readies herself to plunge into the depths below. Trained to fight, and helped by new friends who will stand at her side, Jackie takes part in the Tower's most ambitious undertaking yet - an attempt to find a way to ground level. But with the disease known as the Creep growing stronger with every passing floor, will she be able to help lead her team to victory? Or will they fall victim to the same horror that has kept humanity imprisoned for...