In the movie, Ash, Pikachu, and his friends travel to Alto Mare, a beautiful city surrounded by water where they encounter Latias and Latios. The siblings are highly elusive and only reveal themselves to a few lucky people whom they trust. The two Pokemon are protectors of the city and its inhabitants, but their true mission is to protect the Soul Dew, a mystical artifact that has bestowed the city with prosperity and peace.
The Soul Dew is an irreplaceable treasure that is highly sought after by thieves Annie and Oakley, who are determined to steal it. The thieves use their technology and cunning skills to evade the two legendary Pokemon and the city's security systems, creating chaos and unrest among the city's inhabitants.
With the help of Latias and Latios, Ash and his friends set out to stop the thieves and protect the Soul Dew. Along the way, they discover secrets about the city's past and the unique bond between Latias and her brother, Latios.
The movie is filled with exciting battles, breathtaking scenery, and heartwarming moments that showcase the bravery and loyalty of the characters. It is a must-watch for fans of the Pokemon franchise and anyone who loves a good adventure.