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. But no matter how much fun Jacky has, she can´t seem to escape her worries. So one starlit night, she makes a promise to keep her family together...even if she has to give up the one thing that makes her happy. But can she stop being Jacky Ha-Ha, if that´s who she really is?