Scarlett's (Emily Iris Robins) new in town, she's only been in the Valley two weeks and she's got a reputation for trouble. After a Saturday detention and a blow up with her dad, Tony, (Ben Oxenbould) Scarlett decides to throw a party for Ed (Ben Schumann) in her suite at Tony's new hotel - the Urban. Ed thought his 17th birthday was going to be an epic failure but this night could change everything. He enlists Luke (Brenton Thwaites), the coolest guy he knows, to invite a select crowd to his party. It's set to be the biggest night of Ed's life but when he dashes home to get ready he is ambushed by his family and gets trapped in a surprise party from hell. Scarlett's gathering goes viral as Luke invites friends who invite strangers. Tammy (Gracie Gilbert) and Ed escape the family snoozefest when they hijack the family car, as Scarlett and Luke get close amidst the now out of control party. Scarlett is starting to enjoy herself until some uninvited guests launch a sofa over the balcony of the hotel, just in time for Tony's return to the hotel and consequently the cops are called. Tammy and Ed finally arrive at the hotel but Ed's epic party has been shut down. They join Luke searching for Scarlett who disappeared after Tony went ballistic. Scarlett calls them from somewhere in the Valley, she's lost and she's scared. Luke, Tammy and Ed set off to find Scar, leading them to the oval at their high school where Eva (Adele Perovic) lights a 'sanctuary' fire - a personal protest that becomes a pagan celebration for the five. It's a burning moment that binds them together.