During the series, Dipper and Mabel hear stories of a sea monster living in a lake; Mabel makes a life-size statue for Grunkle Stan's collection; the siblings meet a boy who claims to be psychic; and Dipper explores a supposedly haunted shop.
In Season 2, Dipper accidentally raises the living dead, the gang comes face to face with a figure from Gravity Falls' history and Mabel challenges Pacifica to a miniature golf-off.
The new season finds Dipper and Mabel digging deeper than ever to learn the secret history of Journal #3 unknown author, while Stan works on a secret project that could change everything in the basement of the Mystery Shack. Scarier creatures, weirder magic and new hilarious characters, including vengeful villains and love interests, will be introduced. Unique puzzle pieces with secret decodable messages will be revealed at the end of each episode's credits.