Mizuko is in grave danger...The gang just discovered that Mizuko has a twin sister named Mayumi, a jealous twin who thinks that Mizuko took "everything" away from her.After Mizuko got the threatening letter by her own twin sister....She's been scared of her life.

Now, it's up to Blossom and the others to protect Mizuko from her evil twin sister, but there's a problem....What is Mayumi's plan?? Trying to kidnap Mizuko or Lloyd?? Or...making Mizuko's life a living hell??

The gang doesn't know! So....Vaiana told the others that they need more help if they are going to find of what was Mayumi's evil plan that she has been working on.So, Vaiana uses a portal gate, a portal that leads to Pandora, the beautiful world where there's many creatures and forests lives!

But mostly famously...The home where the Na'vi lives! As the gang were in Pandora,  secrets will be unfold but not just kind of secrets...Secrets about the lost princesses of the ocean kingdom....And the lost princesses is Mizuko and Mayumi!?

What kind of Secrets that will unfold about Mizuko's past??~