As the town prepares for CrashCon, Liz (Jeanine Mason) and Max (Nathan Dean) attempt to piece together who may be behind a potentially deadly plan targeting the festival. Elsewhere, Maria (Heather Hemmens) and Isobel (Lily Cowles) take drastic measure to learn more about the night Mimi (guest star Sherri Saum) disappeared, while Michael (Michael Vlamis) is forced to do someone else's bidding.