The story tells of two friends Paige, who is Australian and Uki, who is Japanese. Paige visits Uki in Japan, and together they share a dream. The dream is to go to the Great Barrier Reef in Australia. After spending a lot of time at a beautiful lake in Japan having fun with Uki's mermaid friends, they have a wonderful adventure across the ocean on a whale to the Great Barrier Reef in Australia. They have many adventures and often swim with mermaids. Then, the whales and dolphins create a magical wave to take them back to Japan, where their adventures continue.