"The Little Mermaid: The Wedding" is the continuation of the game "The Little Mermaid: Magical Adventure". The action of the game unfolds in a fairy-tale world that was created based on Hans Christian Andersen's "The Little Mermaid", and which is well known to young players from the first part of the game. This time, however, this world has become even brighter and more beautiful - the game uses the latest three-dimensional graphics. New game locations have been added both in the underwater world and on the surface.

The plot of the game unfolds immediately after the end of the first part. The Prince and the Little Mermaid have decided to get married, and a lavish and cheerful wedding lies ahead. While Ailyn is busy with the wedding preparations, the evil Witch, seeking revenge for her defeat, kidnaps the prince. And the Little Mermaid, who had just finished all the preparations for the wedding (of course, with the direct and active participation of the player), has to descend again to the ocean floor with the help of her faithful friends to save her groom. Well-known characters from the first part, Simon the Crab, the little Dolphin, and the Sea King himself will join forces to defeat the evil Witch.

In addition to the already known characters, players will meet and befriend new, amusing, and interesting characters. The wedding preparation is divided into eleven exciting mini-games, interesting for children aged 4-7 years and their parents alike. The Little Mermaid will need to choose her dress, shoes, decorations, and also decorate the gazebo for the wedding ceremony, take care of the treats—in short, engage in a lot of useful and pleasant tasks. In her search for the prince, Ailyn will have to outsmart the evil Witch and her henchman, the Octopus, and emerge victorious from this challenging ordeal. But this is only possible with the help of the player.

At the end of the game, the lovers await their deserved reward—a merry and romantic wedding, after which one can boldly say, "And they lived happily ever after."