At the moment when Mabel wins Waddles the pig at the Mystery Fair, Dipper ruins his chance to impress Wendy. But when Dipper finds a way to travel back in time and changes his fate with Wendy, Mabel's
Dipper thinks he has found the key to wooing Wendy, while Lil' Gideon tries to convince Mabel to move from being just his friend to becoming his girlfriend.