Dolphins in action

10 years old Alex Motto,had always had a love for dolphins (well since he was 5).He remembers the day when a dolphin saved his life risking it's own.It was just a 5 months old dolphin.Now it's time for Alex to save their lives.Thousands of dolphins are getting killed by something.No one knows what.Alex decides to do some investigating with his friends,Ashanti and A.J Wilson.Ashanti and A.J are twins and mostly fight a lot but they get along well when thy're doing something important.Will Alex find out who's behind the case or will dolphins get extinct?