Lucy Wilson might be the scourge of all things extra-terrestrial, but her latest opponent is a little closer to home. Try as Lucy might, her dad just doesn't get it. Earth's last line of defence doesn't get to take days off, even if it means staying out on a school night! Particularly when those nights are broken by the sound of supernatural howling. And ghostly Vikings stalking the streets. And a mysterious coven of druids, led by someone who looks awfully like the little old woman down the road... Whatever her dad says, Lucy's got a job to do. But with night falling, and the waters rising, soon she finds herself cut off from everyone she loves.