Elaine

She is the virtual assistant every modern family needs; she manages schedules, adjusts heating and lighting around the home, carefully times laundry, offers personally tailored childcare... and happens to be sold out nationwide. When an Elaine falls from the back of a truck, right in front of Lucas and his best friend Mac, it seems like the luckiest break in the world. Sisters Libby and Leigh certainly think so, though something is amiss. Why does Elaine only answer to Libby? And why does Libby's pet rock glow in the dark? That is no pet rock, and there is something very wrong with Libby. It is down to Lucas, Mac, Leigh, and her boyfriend Monty, to save their younger sister- and ultimately, the world.