Seventeen-year-old Rue returns home from rehab with no plans to stay clean. She meets Jules, who's new in town, at a party at McKay's house. Nate gets in McKay's head when McKay takes an interest in Cassie. Nate and Maddy, who have broken up once again, attempt to make each other jealous. Meanwhile, Kat is pressured to lose something big.

Rue tries to get clean for Jules and chaperones Gia at the carnival. Jules encounters Cal with his family. Cassie and Maddy, annoyed at their boyfriends, decide to do molly together. Kat hangs out with Ethan until she misreads a situation. Nate reveals who he really is.

In the aftermath of the carnival, Maddy and Nate are forced to deal with a police investigation. Jules begins to feel pressured by her role in Rue's sobriety. Kat ignores a confused Ethan and embraces her new lifestyle. Cassie ries to distance herself from Daniel and focus on her relationship with McKay. Cal worries about how his actions have affected his sons.