Adrain Pines is the oldest adopted son of the Pines family, who unfortunately had to leave for the summer along with his two young siblings, to stay with their Great Uncle Stan for the summer, who lives in a mysterious, sleepy town in Oregon named Gravity Falls. Or as Adrain calls it, "W.H.A.T"

This story is based off an adventurer party in the isle of drakes, when a mysterious man by the name of silver horn sends these people on the quest of assassination, I wonder what creeps and wonders await them.