With her irresistible urge to tell a joke in every situation - even when she really, really shouldn't - twelve-year-old Jacky Ha-Ha loves to make people laugh. And cracking wise helps distract her from thinking about not-so-funny things in her life, like her mom serving in a dangerous, faraway war, and a dad who's hardly ever home.

Narrowly surviving their encounter with erasers in New York City, the flock is following up a lead on their pasts in Washington, D.C. But what they find waiting for them is ... a home?! How will the flock adjust to a real school - one that doesn't involve mad scientists and genetic freaks?

The only thing she remembers is that they told to wait on a street corner until they came back for her. That was ten years ago. The day that she finally gives up waiting is the moment her life changes for ever.