The bucolic tranquility of Greylock, New Hampshire, is upended when a massive vein of an incredibly valuable mineral is discovered under the town.

After an unexpected snowstorm leaves Greylock stranded with no plows, Sarah and the town come up with a creative plan to clear the roads. During the storm, Sarah gets two unexpected guests and tries to figure out how to navigate both circumstances.

When Sarah discovers that everyone in Greylock is being charged foreign transaction fees, she enlists her friends to help her create own currency. Grover shares with Danny what really happened to Corinne after he left.

Greylock's fledgling congress must decide their immigration policy now that new people want to immigrate. Sarah and Danny face someone from their past and have different reactions to the visitor.

When Corrine confides in Sarah about what happened with Danny, Corinne also admits that she needs Sarah's help with something she has always questioned. Sarah confronts Danny about what happened, leaving Danny to make a decision about his future.

When the governor of New Hampshire closes Greylock's borders, Sarah calls on Bella, Tyler and Maya to help her solve the problem. Corinne pushes Danny to reveal a secret that he's been keeping from everyone.

With Lydon's workers causing problems, Sarah drafts an executive order to help protect Greylock's residents. Grover introduces Danny to a new friend, but they have more in common than Danny realizes. Maya feels abandoned.

When Danny shares good news about Greylock's finances, Sarah winds up in a debate that traps her between her two closest friends. Corinne is trying to right her wrongs, but she can't catch a break, especially after Sarah drops a major bombshell. Meanwhile, Bella and Tyler get creative with each of their school projects, which helps Sarah and Grover in ways they didn't realize they needed.

Sarah is faced with her first major challenge as a leader when Greylock's power is shut off. Bella pushes boundaries with her dad when it comes to spending time with Tyler and Sarah.

Sarah is offered a chance for international recognition of Greylock but the price may be too high. Danny offers to help Corinne with her legal woes but she asks him for something unexpected.

After a damaging magazine article is written about Sarah, she realizes that it's time for Greylock to create a more representative government. With an election open to anyone, Danny, Maya, AJ, and Corinne take a shot at the four available seats.

Sarah and Paul start to make headway in their relationship. Ellen surprises everyone by coming home earlier than expected. Danny accidentally makes things harder for Corinne, leaving her with a tough choice about some of the people in her life.

Greylock is threatened with a massive flood as unseasonably warm weather melts the snow from the recent blizzard. Knowing Greylock will be underwater in hours, Sarah must ask for help from the last person she wants to rely on—Paul.