From the publisher web:

A friend has seemingly vanished. Playing as Harry, Ron, Hermione, Ginny, Luna or Neville, you must try to discover WHO did it, WHAT spell or item they used and WHERE the student was attacked. Was it Fenrir Greyback with a Cursed Necklace in the Forbidden Forest?

Use the Floo Network to travel faster through the wizarding world...but watch out for unlit fireplaces. When you're sure of your facts, go to The Burrow to make your final accusation and win the game!

NOTE: it's not Clue: Harry Potter Edition, it's a different game, based in the two last films.