Tired of hearing tales of Hiddenville's legendary mayor, the kids use a time machine to travel back 60 years to disprove the myths; but when they inadvertently alter the past, the effect spells disaster for their hometown.

As Sarah and Gideon's crushes on Max and Phoebe escalate, the twins attempt to solve the problem by setting them up on a date with each other; Max wants to win back Sarah after he discovers her uncle is a rock star.