When all adults disappear without warning, the world does not end - it changes. Teenagers are left behind inside sealed blocks, where survival depends on silence, order, and obedience. But something outside is watching them. Monsters begin to take people. Supplies arrive without explanation. And the deeper Ellie searches for answers, the more she realizes the truth may be worse than the collapse itself. Alongside James and the others, she is forced to survive a world that is slowly revealing it was never truly theirs.