Kyra and Nat argue and fight like other brothers and sisters, but they're driving their dad crazy. When he threatens to ground them for a month, they stop talking to each other.
Then the earth is attacked by hostile aliens. The streets are dangerous, their neighbours minds are being taken over by the invaders. Kyra and Nat have no other option; they have to work together just to stay alive. How long will this truce last and have they got what it takes to defy their deadly enemies?