Christy’s parents forbid her from returning through the portal, but her grandfather is still stranded in the Empty World. When Danny and Brad accidentally take a trip into the portal, Christy finds the excuse she needs to disobey her parents and go after them. Unfortunately for Christy, she’s stuck with Cory for a traveling companion.
Thus begins another journey through the Empty World, looking for the people they’ve lost, and for a way back home. Along the way, they’ll have to deal with the two intelligent species native to that alien world, and unravel the workings of the ancients’ portals.
Can Christy get them all safely home, or will her feud with Cory result in all of them being lost for good?