Dive into the depths of Atlantis with Andi, a fiery young mermaid with hair as vibrant as the ocean's sunset. Together with a playful dolphin named Flow, they explore the beautiful underwater realm where they meet a lost whale, a school of sea horses and also stumble upon a sunken pirate ship. Andi's birthday celebrations are in danger of being spoiled, as she is forced to fulfil the selfish demands of a tyrannical sea beast. Will Andi be able to save the magical city from the giant sea beast? Find out in the adventure of a lifetime as Andi discovers the true meaning of courage and friendship.