Cody 's adoptive mother does n't want him to leave , but the mermaid telepathically promises to send Cody back before school starts .
Cody explains she wants him to go with her because she 's the only one who can help him with his changes .
Cody 's adoptive mother does n't want Cody to leave , but the mermaid telepathically promises to send Cody back before school starts .
Cody explains she wants him to go with her because she 's the only one who can help him with his changes .