Months after Ash wins the Alola League, and is now working as one of Professor Cerise's Research Fellows, returns home only to find out most of his friends and family have turned their backs on him and betrayed him. When he goes missing for 5 years, a 15-year-old boy emerges from the shadows as 'The Mount Silver Legend'. After 5 years, a tournament is hosted called the Battle of Engima. After years of training, Ash Ketchum competes in the tournament and plans to show those who turned their backs on him how much he's grown since they last met each other.