It's time for a Dollhouse Delivery! When Gabby opens the Meow Meow Mailbox she finds an invitation to MerCat's Spa Day Party in the dollhouse.With the help of her magic cat ears, Gabby and Pandy Paws shrink down and join their friends in the dollhouse to get ready.But when MerCat's colour and sparkle fade away, can the friends help her get back her glow in time for the party?Gabby and the gang get creative and whip up some super squishy face masks, special soap and a magical item all the way from Mermaidlantis that bring the sparkle back to the spa day!