It has been six months since their father locked them in the security vault with a promise to return. But he never came back. With supplies running out and vital life support systems failing, Jack, Samantha, and Will have no choice but to ignore their father's warnings and leave the vault. With no knowledge of what befell the world outside, or what they might expect once the door is opened, they find themselves in a world they do not recognize.Thrust into the remains of the world they remember, how will they survive on their own, not knowing what or who else remains amongst the ruins?