For the last two years, Christy Ung has been in the same class as the loud-mouthed Christie Owens—and now it's 3rd time unlucky in 6C. Christie Owens is the popular one so everybody calls Christy Ung, the Other Christy. She moved from Cambodia in Year 4 and is still a loner at school. Christy's one solace is baking with her Auntie who suggests they bake a cake for Christy to share with her class on her birthday. Maybe a sweet treat can win them over and Christy might find a friend. She just didn't expect it to be Christie. When Christie is ditched by her besties, the two girls who share a name strike an unlikely friendship. Christy lets down her guard, revealing secrets about her weird upbringing with her clean-obsessed Grandpa. But Christy soon realises that she and her new friend are worlds apart. Can she ever shake off her Grandpa's strange habits? And will the two girls ever have more in common than just their name?