Rescuing The Tomboyish Mermaid

first day of pokemon summer camp while all the heroes meet outside Ash's house due to some reasons the Summer camp gets closed for 1 month out of 2 months and heroes get to do homework for 1 month...while all these happens our misty gets disappeared!what will ash do?will they go to rescue her?who kidnapped her?what's going to happen further in the journey? welcome to.... Rescuing the tomboyish mermaid!