When nine-year-old Felix installs the “Zombies Alive” add-on to his favourite computer game, he finds out that zombies are messy and smelly and dirty and loud. And they eat your homework. But what’s worse than a room full of smelly zombies? An evil sorcerer who’s mutating the zombies and destroying the house, that’s what! Felix and his best friend Ziggy need a plan to undo the Zombies Alive add-on and send those zombies back to the digital world. But the evil sorcerer is coming for them and Felix’s parents are on their way home… They might need more than a plan, they might need a miracle!