At the all night graduation lock-in party, graduates set out to fulfill their unfinished business. For many, it’s their last chance to live their high school dreams, but things inevitably take a turn for the Senior Class of Sherman Grove High School.

A last minute arrival at Grad Night causes a stir as students create videos predicting where they will be in 20 years. Deanna vows to tell Fig her true feelings while Roni’s friends try to convince her there is another reason why Oz is pulling away.

As karaoke commences, Roni makes a huge announcement only to be topped by the revelation of an even bigger secret. Bryce begins to lay the groundwork for his seduction of the gym teacher’s wife. Christian urges Melinda to come out of her shell.

The stroke of midnight means it’s time for Midnight Madness, a crazy game that ends up amplifying the bad blood between Deanna and Cassie. Roni, Alexis and Lyssee plot their revenge on Oz and Melinda makes a plan to acquire more alcohol for the party.