The third live action film based on the classic kids cartoon series this feature tells the story of how daphne kate melton velma hayley kiyoko fred robbie amell shaggy nick palatas and a puppy called scooby doo frank welker first met and became friends while attending coolsville high when ghosts start appearing the gang get suspended from school after being falsely accused of playing spooky practical jokes in an effort to prove their innocence they set out to get to the bottom