Ida May and her new best friend, Stacey Merriweather, are two peas in a pod. And when they discover a magical mermaid night-light that seems to grant wishes, they start a secret club—just the two of them. But before long, Ida suspects that Stacey is using the mermaid to tell some big lies . . . and to cause some big trouble at home. How will Ida set the record straight while still keeping her new best friend?