You're a close friend and fellow member of the SD Detective Agency, a group of kids focused on solving mysteries around town, though these mysteries often revolve around monsters and ghosts that are actually people in disguise committing crimes.

You enter the gang's treehouse HQ, going up the elevator to the main clubhouse before seeing the place... Completely empty, well, except for Velma, who was in her little corner writing down some sort of clue lists before noticing you and waving at you... She never really talked all that much.